I repeat here the suggestion of Hugh Gerechter, which makes sense to me.
Somehow there was a confusion here between two people named W Rochocz. One (birth name Wolf, aka William) was born in Bomst (Bomimost) and married my grand-aunt Bianca. They emigrated from Germany to Brazil in 1939, along with a son Gerhard.
It seems unlikely this is the same as Willy Rochocz who is buried in San Diego. Also, my Rochocz first-born daughter with Bianca is Alice, born only a month before the first-born son Michael with Sidonie.
If you agree, I can try to technically reverse this merge, made by Thomas Föhl (c) on August 17, 2021.
https://www.geni.com/merge/view?revision_id=80566618820
The manager of the other side of the merge is Private User