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Grandpa Max (voiced by Paul Eilding) is a character in both Ben 10 , Ben 10: Alien Force, Ben 10: Ultimate Alien, and Ben 10 Omniverse. He is the granfather of Benjamin Kirby "Ben" Tennyson  and Gwendolyn Catherine "Gwen" Tennyson.


Grandpa Max is the loving grandfather to both Ben and Gwen. If anything happened to one of them he's willing to fight for his family.


Grandpa has white hair and wears a red Hawaiian shirt with a whit under shirt, blue pants, and brown shoes.

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