My father's name is Ansis Gutmanis. He was born in Ventspils in 1912. He had 5 sisters. His parents were Fricis Gutmanis and Zenija Mazutis. Fricis had a brother (I dont know if more than one), named also Ansis. My father fighted at the IIWW and emigrated to Brazil in 1949. We are not sure
about Fricis father's name: maybe Matiss or Osvalds. Maybe he could be a brother of yours Valdemars Gutmanis. I know that Fricis and Ansis went to USA in late 19th century, started a shipyard, but after some years and 2 daughters, they went back to Latvia.
I know that my father, after some years in Brazil, intended to go to Australia. Maybe he knew that there was a relative of him.
Just these days I got to know about Margers Gutmanis, born in Latvia about 1900 or even earlier, and worked as Geology engeneer. About 1930 he went to Argentina and later to Brazil.
PS: I live in Piracicaba city, at São Paulo state - southeast of Brazil.