Advice before adding child of this pre-1700 Meijburg profile?

Question

I can add a child to the profile of Albert Lammertsz Meijburg. This is who I can add:

• Lambert, Willem, Elsje, Jacobus, Albertus, Petrus and Hendrina

These are the sources I am using:

• Myburgh Familie van Suid Afrika 1665-2009

Should I contact one of the pre-1700 projects or know about any style guidelines before proceeding? Thank you!