My grandmother, Stella Sowinski Evanich had a brother named Frank Sowinski and they were from Milwaukee, WI. She had other siblings named Stanley, Nick, Alex, Leo, Michael, Anton, Walter, Josephine, and Anna.
Frank and Stella's parents were John Sowinski and Mary Ochocka Sowinski, and I believe they emigrated from Poland. They didn't speak English, only Polish. Stella married Joseph Evanich and had 3 daughters: Helen, Dorothy, and Josephine (who is my mother). Stella Sowinski Evanich died Feb, 1961.
Her death notice, however, doesn't mention Frank or Anton, just the others. She's buried at Arlington Park in Milwaukee.
If you have any listing of Frank's brothers and sisters, perhaps we can find out if Frank and Stella Sowinski were indeed from the same family.