Leopold Wohlgemuth went to Brazil
Having updated Ancestry with the name of Julius Wohlgemuth's son, I next ran a search on Leopold Meyer Wohlgemuth. The first hit was definitive.
He received a immigration permit from the United States of Brazil in September of 1960. The permit was issued at Brazil's consulate in Beunos Aires, suggesting that Wohlgemuth had been living in Argentina before that. His nationality is listed as German; perhaps he has already reclaimed German citizenship under the post-War administration.
It is definitely our relative because his birth date and location are right, as are the names of his mother and father. His professional is listed as merchant. He has no wife or children
I wonder what kind of life he made for himself in Brazil. I will dig deeper to see what else I can learn. Meanwhile, it is thrilling to look at the picture of Elly's first cousin as he begins life in 1960 as a Brazilian immigrant.