Question

who is my great great grandfather [closed]

Answer 1

He is your great grand uncle's uncle and he is your 1st cousin twice removed's grandfather and your great great grand uncle's brother, but perhaps more importantly, he is also the great great grandfather of both your first, second and third cousins.

Answer 2

Keeping it simple, he is your grandfather's grandfather

Answer 3

He's great great grandfather Oakes, of course! Unless you mean one of the other seven...can't help you there.

(In seriousness, anyone who wants to help you, can't help without more information like who you are or who another ancestor is.)