I've been trying to research this family for some time now. Many seem to descend from a Carl Cyster, who was born about 1820. If anyone has further information on different family lines i'd be interested to hear about it. I'm not a direct descendant, it's through 2nd and 3rd cousins etc. As i'm sure you'll know, South African records are practically impossible to get a hold off, so I've tried to piece together the family from stories etc. The line i've studied is Henry Cyster (1882-1968), who was the son of Garnaat and Charlotte Cyster, and married Margaret Moyes in 1908.
Cheers!
Ryan.