Searching for relatives of Stanislaus Wilczynski dead or alive

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.

Over 8,000 people in Poland currently sign themselves Wilczyński. The single largest concentration is Warsaw (388), followed by Wrocław (212), £ódź (208) and Poznań (159),

Thank you. I have not had any luck finding relatives but will continue searching.