Transferred use of the surname, in origin a local name from the English county. This is probably named with a Celtic word meaning ‘border’. Use as a given name is of recent origin, but it is now quite popular. It may in part be seen as a short form of Kenton.
Respelling of French De la Noye, habitational name, with the preposition de, for someone from any of various places called La Noue or La Noë, for example in Marne, Charente, Maine-et-Loire, named with Gaulish nauda ‘moist or marshy place’, ‘swamp’.