Yes! In fact, Gwen's name is Gwendolyn Tennyson and Ben's is Benjamin Tennyson
and the both called Grandpa Max Grandpa and also Gwen calls Ben's mom Aunt Sandra. In Ben 10 Alien Force there is an episode which telss Gwen is Ben's cousin.
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No - They are both 10 years old in the original series and 15 years old in Alien Force. Despite only being cousins, they were actually born on the same day (as revealed in "Camp Fear" - An episode of the original series!)
Gwen is 10 in the original Ben 10.Gwen and Ben share their birthdays.Just watch episode7,season2:Camp Fear.
yes check out tha story on deviantart its called BenxGwenxKevin Its an inteeresting fiction :D BUT not sure if they love each other in real ben 10 alein force series but it would be interesting if they did, they could be long distance cousins so it would be less awkward.
hi iam from the new present :P lol but an episode of ben 10 ultimate alien was just released and Kevin is evil again after absorbing bens ultamatrix
because they are related, they are kinda brother and sister for the summer and then that kinda of feeling stays because they are only children. plus the sibling thing cause's all sort's of things, fighting & rivalry to name a few
Erin is older. I always thought Ben was, but it turns out Erin is. Earl Hamner confirmed it.
He's in Ben 10:The negative 10.he's also in the beginning of Ben 10 Secret of the Omnitrix