Gaston \g(a)-ston, gas-ton\ as a boy's name is of French origin, and the meaning of Gaston is "man from Gascony". Gascony is a region in the south of France whose inhabitants are reputed to be hot-tempered. Also the name of the unlucky and boorish suitor in Disney's film of "Beauty and the Beast".
Gaston has 1 variant form: Gascon.
A baby name that sounds like Gaston is Giustino.