Willem Slier
HER FATHER, AND HALF OF A NAME THIS ARCHIVE HAS BEEN TRACKING FOR WEEKS. Of Hamburg; married ANNA CATHARINA FORTMAN on 19 NOVEMBER 1780 at the Cape; four children baptised between 1787 and 1797. His grandson, baptised in 1809, is WILLEM Hermanus Pietersen — Willem for this man and Hermanus for the boy's own father — and that is the whole derivation of a name two Booyzens in the direct line would later carry. HALF OF IT IS GERMAN AND NONE OF IT IS BOOYZEN BLOOD.
Every record naming Willem Slier →
No family is drawn here, because none is recorded. This archive holds Willem Slier as a name on a document — a witness at a font, a signature on a form, a person named in someone else's list — and has no record of who their parents, spouse or children were. That is a statement about the sources, not about the person. Every record naming them →
The record
| Name | Willem Slier |
| Also written | van Hamburg |
| Born | — |
| Died | — |
| Line | Mountjoy |
| Confidence | Documented |
What the archive holds
HER FATHER, AND HALF OF A NAME THIS ARCHIVE HAS BEEN TRACKING FOR WEEKS. Of Hamburg; married ANNA CATHARINA FORTMAN on 19 NOVEMBER 1780 at the Cape; four children baptised between 1787 and 1797. His grandson, baptised in 1809, is WILLEM Hermanus Pietersen — Willem for this man and Hermanus for the boy's own father — and that is the whole derivation of a name two Booyzens in the direct line would later carry. HALF OF IT IS GERMAN AND NONE OF IT IS BOOYZEN BLOOD.
- 15 Sep 2026 — “WILLEM HERMANUS PIETERZEN — Anna Catharina Slier's FIRST husband”
HE IS THE SON. De Villiers's volume 3 gives “HERMANUS PIETERSEN, namen van ouders onbekend, gehuwd 5 April 1807 met ANNA CATHARINA SLIER”, and their children as “1 Willem Hermanus, gedoopt 12 Maart 1809; 2 Johan Christiaan, gedoopt 28 April 1810”. THIS ARCHIVE BUILT ONE MAN OUT OF TWO DOCUMENTS THAT SPELL HIM DIFFERENTLY — the 1817 marriage register's HARMANUS PIETERZE and the 1840 death notice's WILLIAM PIETERSEN — and a long name looked like a way to reconcile them. The husband is Hermanus; Willem Hermanus is the boy baptised in 1809. This archive half knew, because its own note already called the 1851 godfather “his son”. THE NAMING CLAIM SURVIVES AND IMPROVES: Willem Hermanus is Willem for his mother's father, Willem Slier of Hamburg, and Hermanus for his own father. A SECOND HALF-BROTHER, JOHAN CHRISTIAAN, WAS INVISIBLE FOR AS LONG AS THE TWO MEN WERE ONE. Where it stands →
The documents
…One of them is a whole family, and it answers a woman who has been on this site as a birth year and five spellings. It also shows that what this archive has been calling her first husband is two people. 876.—SLIER. Willem Slier, van Hamburg , gehuwd 19 November 1780 met Anna Catharina Fortman .…
The Marriages
…12 Mar 1809 — Willem Hermanus Pieterzen — — Willem Slier — — William Henry Keys 1854 — William Henry Keys the younger 10 Jun 1882, baptised 23 Jul 1882 at Dordrecht — Xaverius Hermanus Pieterzen — — Held on 69 a record read here · 12 inferred.…
The Name
…De Villiers, volume 3, entry 876: “ Willem Slier, van Hamburg , gehuwd 19 November 1780 met Anna Catharina Fortman.” It is a German name. Schlier or Schleer, spoken by a Hamburger and written down by Cape clerks who had never seen it on paper — which is exactly how one woman ends up with five surnames in five documents inside one lifetime. Nobody argues that the Sliers changed their name.…
The forenames
…Since 15 September both halves of it have a man behind them. Who When What they are to the name Willem Slier of Hamburg, m. 1780 THE SOURCE OF THE FIRST HALF. Anna Catharina Slier's father, married Anna Catharina Fortman at the Cape on 19 November 1780. His grandson carries his forename. Hermanus Pietersen d. bef. Mar 1817 THE SOURCE OF THE SECOND HALF, and until 15 September this archive had him and his son as one man. Anna Catharina Slier's first husband, married 5 April 1807.…
The People
…Named as the father on the Burgersdorp baptism of 23 October 1853, two entries above his sister-in-law's child. The Barry fonts Disputed Anna Catharina Fortman Documented — — Her mother. Married Willem Slier of Hamburg on 19 November 1780 and gave her own name to a daughter baptised on 14 October 1787 — who carried it through two husbands and ninety-eight years. The Documents The Women Lena Millie Frachet also written born Mountjoy Documented — — Daughter; married out of community of property to Eric Bernard Frachet.…
Aletta Johanna Hattingh
…HER OWN PARENTS ARE NOT RECORDED ANYWHERE THIS SESSION REACHED — a register row has no question three. The Women What Has Been Read Every mention, page by page Others on the Mountjoy side Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Anna Catharina Fortman
…Married Willem Slier of Hamburg on 19 November 1780 and gave her own name to a daughter baptised on 14 October 1787 — who carried it through two husbands and ninety-eight years. Anna Catharina Fortman Mountjoy No household in this archive names this person, as a child or as a parent. They are here because a record names them, and that record stands alone.…
Anna Catharina Mountjoy
…The thirteen Mountjoy children The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902. Carolina Deybella Margrietta Alletta Botha c.…
Anna Catharina Sleer
…The Women The Documents Where the archive puts Anna Graaff-Reinet Town, Cape Colony · Karoo Each carries the document that puts them there. The atlas → Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902. Carolina Deybella Margrietta Alletta Botha c.…
Annie Louisa Nepgen
…The failure is never the searching. It is writing down what a result list says without asking what this archive already holds. Where it stands → Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902. Carolina Deybella Margrietta Alletta Botha c.…
Aubrey Diesel
…12. 2. The Documents Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Benjamin Jacobus van Niekerk Ninth, and a minor in 1902. Carolina Deybella Margrietta Alletta Botha c.…
Benjamin Jacobus van Niekerk
…The Documents Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Carolina Deybella Margrietta Alletta Botha c.…
Carolina Deybella Margrietta Alletta Botha
…The Documents The Women Where the archive puts Carolina Dordrecht Town · Wodehouse Each carries the document that puts them there. The atlas → Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Carolina Deybella Margrietta Alletta van Niekerk
…The notice enters her as married to an Edward Huskins. The Documents The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Carolina Isabella Margaretha Aletta Mountjoy the second
…She married Hendrik Stefanus Palm, and a granddaughter born in 1920 carries the name again. FROM THE INDEX. The Namesakes The Women The Register Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Carolina Isabella Margaretha Aletta Mountjoy
…Her name was given again to the next daughter but one. FROM THE INDEX. The Namesakes The Women The Register Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Catherine Louisa Johanna de Kock
…THIS IS THE ONE OF THE SIX THAT STILL NEEDS ORDERING FROM THE CAPE ARCHIVES. The Women Open questions What Has Been Read Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Cecil Frederik Keys
…A Cecil Frederick Keys turns up later in the Transvaal probate index, unread. The thirteen Mountjoy children What Is Still To Ask Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Charles Mountjoy
…The Documents Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Christiaan Jacobus van Niekerk
…The Documents Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Cornelia Elizabeth Gertruida Ross
…The Documents The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Cornelius van Niekerk
…The Documents Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
David Schalk van der Merwe
…The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Elizabeth Maria Mountjoy
…The Women What Has Been Read Open questions Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Ellen Sophia Schmidt
…The Documents The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Elsje Petronella Frederika Mountjoy
…Elsje appears nowhere else in this archive. The thirteen Mountjoy children The Women Every mention, page by page Others on the Mountjoy side Aletta Johanna Hattingh 1898, Cala, Cape Province – 10 Oct 1939, Bizana Anna Catharina Fortman Her mother. Married Willem Slier of Hamburg on 19 November 1780 and ga Anna Catharina Mountjoy 5 Aug 1852, baptised 11 Jan 1854 – — Anna Catharina Sleer bapt. 14 Oct 1787 – 1885 Annie Louisa Nepgen Daughter; married in community of property to Arnoldus Fredeman Nepgen Aubrey Diesel Grandson, a minor in 1938; the other half, £10. 12. 2. Benjamin Jacobus van Niekerk Ninth, and a minor in 1902.…
Others on the Mountjoy side
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A dossier is every mention of a person anywhere in this archive, gathered automatically after the site is built and linked back to the page it appears on. Identity here is by NAME, not by resolved individual — where two people share a name they share this page, and the archive says so rather than guessing. Nothing on a dossier page is new evidence; it is the same evidence, brought together.