Genealogy / Searching for relatives of Stanislaus Wilczynski dead or alive [3]

My grandfather's name was STANILSAUS WILCZYNSKI. Born 1898 in i think Posnon? died 1947 in New York. I know nothing of his ancestors or parents. He had 2 half brothers that emigrated to the usa with him about 1916. Don't have their names. Can anyone help me find information?

Merged: wilczynski name in Posnon

Looking for any information on the wilcznski name from Posnon Poland. Departures to United States around 1914 to 1930. Trying to locate my grandfather's ancestors.