Davis is a fresh way to say David. Some sources define it as "son of David," but we see it as a surname spin on the original. While David is an everyman name, Davis has some creative edge -- and still gets you to the classic guy nickname Dave.
Davis can be a good way to name a boy after grandpa David; Davies, Davison, or Davidson will also do the trick.
In the TV show One Tree Hill, the Sophie Bush character gives one of her twins her maiden name of Davis. Davis Guggenheim is an Oscar-winning director and documentarian, married to Elisabeth Shue.