although I am not Ray, but Marcin, I'm responding to your post :-)
My great-grandfather is Piotr Kosiorek, but I do not know his parents, or when and where he was born. But he lived in the vicinity of Lomza. He died around 1918. He married Katarzyna Boguska had five daughters Julia Kosiorek (born in Biała Podlaska), Stefania Kosiorek (my grandmother, born in Wizna 1908), Anna Kosiorek, Elżbieta Kosiorek i Maria Kosiorek). They lived and went to school in Lomza.
Do you know something about these names?
Marcin (from Poland)