Looking for info on both of my paternal Great Grandfathers.

1. Lorenz Basinski, also known as Frank

2. Clemons Czechowski, also, written as Clements, Klements.

Specifically, looking for info on their parents. I have the census info, but nothing about their parents, except, I believe, Clemons mother's name which was Wendlarski. Big Polish names, and it seems everyone changed their first name at least once.