Susanna Fourie, b1 SM - Birth Sources?

Do we have Sources for Susanna Fourie, SM 's birth date as 6 September 1694, Wellington, Caap de Goede Hoop, Suid Afrika?

Unless I'm looking squiff (quite possible) the cited Source [https://s3.amazonaws.com/photos.geni.com/p13/84/d9/cf/a6/5344483993...] has nothing to do with her birthdate?

Delia Robertson estimates it between 26 October 1698 and 27 March 1701
"Date estimated by FFYP compiler, Delia Robertson and, unless there is corroborating information, should not be considered as anything more than a guide - In the inventory of her mother's estate on 25 January 1715, Susanna is listed first of the vijf minderjaerige siblings who survived their mother, indicating she was the oldest of the five. The age of majority for girls at the time was 22 years old, which indicates she would have been born after 25 January 1693. Her sister Francoise (apparently deceased in infancy) was baptised on 4 Sep 1696; her sister Marie (apparently also deceased in infancy) on 26 October 1698; and Martha, younger than Susanna, was baptised on 27 March 1701. The mother, Suzanne Cordier was just 15 years old at the time Francoise was born - suggesting this was her first child. The most likely gap for Susanna's birth would have been between Marie (bapt. 26 Oct 1698) and Martha (bapt. 27 March 1701) which is where I have allocated it. Bear in mind that this is only an informed speculation - which it must remain unless records indicating a more precise date are located. This also fits with the age many young women married at the time (14-16), given that when she witnessed the baptism of Susanna Odendall on 9 Jan 1717, she was already married to Jan Nel." http://www.e-family.co.za/ffy/g5/p5711.htm