Broodrÿk with the Umlaut sign

In the early days the name was spelt Broodrijk which might have looked like the umlaut sign. If you give me dates of birth of SJ and DS I can see what I can find. Their spouses names would also help.

Stephanus Johannes Broodrÿk was born in 1907 and died 1970, do not have the exact dates
Wife, Engela Broodrÿk(Botes) have no dates
David Stephanus Broodrÿk was born July 8, 1929, died January 6, 1960 Richmond, Cape Town
Wife, Dorothy Scholtz (Stockdale), bornJune 9, 1931 and died March 22, 2000