wdowiak is the actual spelling of the name, but in my family it shows other spellings and alt. of the last name. they are wdoviak, doviak, donyak, doniak, vdoviak. so you may want to check into these spellings as well when looking for information.
don't forget alot of thimes last names were spelt the way a person had heard it, not by how it was actually spelt.