Matthys Johannes Booyens 1880-1968
Born 28 February 1880, Oudtshoorn
Baptised Circa 1880, Oudtshoorn, Cape Colony
Died 28 July 1968, Bethlehem
 x Married 6 October 1903 Mushroom Valley in the district of Winburg
Susanna Johanna Margaretha van Rensburg 1883-1957

Theunis Jacobus Booyens 1881-1889
Born 18 July 1881 6
Baptised 4 September 1881, Oudtshoorn 7
Died young, likely Between 1889 and August 1994 8

Pieter Johannes Booyens 1883-1972
Born 31 January 1883
Baptised 25 March 1883, Oudtshoorn
Died 13 December 1972, Bethlehem, OFS
 x Married on unknown date Thaba 'Nchu
Anna Maria Etresia Caalsen Born 1898

Elizabeth Anna Margaretha Booyens 1884-1917
Born 26 October 1884 9
Baptised 21 December 1884, Oudtshoorn 10
Died Before April 1917 11

Johannes Hendrik Booyens 1887-1917
Born 12 January 1887 12
Baptised 1 May 1887, Oudtshoorn 13
Died Before April 1917 14

Sarah Susanna Petronella Booyens Born Circa 1889
Born Circa 1889 15

Notes: The only formal evidence we have of Sarah's existence, is the listing of her name on her father's 1917 death notice and in a death notice for her husband. We have found no death notice for her, no baptism entry, no birth registration, no recorded marriage anywhere. In her father's 1917 death notice (VAB MHG B4304) it is recorded that she is already married at that time to "Wm v.de Vlies."
By the Afrikaner Naming Convention, the second daughter should bear the name of the husband's mother. Pieter Booyens' mother is Sara Susanna Snyman. This leads us to conclude that Sarah Susanna is the second daughter. Since we have a known birth date for Gesina, who has to be the third daughter, named for the wife, it places the birth of Sarah around 1889-1890
Any help in clarifying the picture around this lady would be most welcome.

 x Married Before 1917  16
Willem van der Vlies Died 1939
Died 1939 17

Gesina Maria Booyens 1892-1893
Born 12 December 1892 18
Baptised 2 April 1893, Winburg 19
Died Between 1893 and 1901 20

Theunis Jacobus Booyens 1894-1962
Born 10 August 1894, Winburg
Died 1 May 1962, Bloemfontein
 x Married 11 February 1919 Ficksburg, OFS
Johanna Jacoba Wilken 1899-1980

Willem Jacobus Booyens Circa 1896-1971
Born Circa 1896
Died Before 1971
 x Married Circa 1916
Marthina Johanna Caalsen 1896-1971

Gesina Maria Booyens Born and died 1901
Born 8 November 1901, Winburg Concentration Camp 21
Died 20 November 1901, Winburg Concentration Camp 22