elecmectek on Family Tree Circles

I have no clue how to do this but I would like to know where my last name came from.
I cannot ask people in my family since I am 38 years old and just now found out the my whole life as a child was a lie. See my moms retarded and my dad does not speak to me.

I know my last name is White, my grandfathers last name on my dads side is White, my grandmothers last name on my dads side is greathouse.

My grandfathers last name on my moms side is Coxx and my grandmothers last name on my moms side is Bishop.

Can someone please tell me where to start. I know the White's and Greathouse's are from West Virginia and the Bishop's are from PA. I am not sure where Coxx is from.