dont know much need help

im researching the blevins family.my dad was jack blevins born to nancy miller. never knew my grandpa because he and my grandma never married. i think my grandma was from va.i dont think jack was my dads given name.i always heard he changed his name when he got older.my dad was from roan mountain tenn.when my dad became a man my grandma married a man named henry clark,but i dont know what year.my dad marri4ed my mom in i think 1952 her name was dorothy francis lowe.my mom died in 1984 my dad died it was either 2000 or 2001.that is about all i know.if anyone can give me anymore info on this blevins clan ,it would be greatly appreciated thanks.