1) Celtic boy name 
Kelvyn is a Celtic name for boys. The meaning is `from the river` The name Kelvyn is most commonly given to French boys. (13 times more often than to American boys.) The name sounds like: Kalvyn, Kelvon, Kelven, Kelvan Similar names are: Kelwyn, Kelvys, Kervyn, Kevyn, Melvyn