Anyone into Genealgy ?

I found 1 great grandmother with her name spelled 2 different way. Both her first and maiden name. My other great grandmother I found as both Elizabeth and Lizzie before finding her name prior to coming over as Beta.

My great Grandfather changed his first name to William when he came over. I later found his name was Vaclav. I still have yet to find much on my other great grandfather " Harry " Im pretty sure I will find his last name was not Rushka before coming here.