Duell/Duel/Deuel/Davol Family

I'm kind of at a brick wall right now. I'm looking for the children of Tristram (sp.) Deuel. The only info I've been able to find on Tristarm is his name. I've not been a ble to find any vitals on him. I'm also looking for a John Deuel whose son was Geoge B. Duell.
I'm kind of new at this genealogy thing. Any help would be appriciated.