Genealogy / Looking for Wasylkowski family history after moving to the USA from Europe (Poland?) [5]

Hi, has anyone here ever heard of the surname "Wasylkowski"? I am American from Wisconsin. My family moved to the USA in the 1880s from Europe to escape Russian occupation? That's all I know.

This surname sounds a bit unusual; and I am wondering if it is actually Polish? Does anyone know what "Wasylkowski" means? But, I am sure I have Polish heritage as I grew up in a community with lots of Polish people?

I have found a tramway in Kiev with the name "Vasylkivska". Which sounds close enough to Wasylkowski. Could I actually (also) be Ukrainian?