From Middle Dutch quant meaning "companion, comrade" or "trickster, prankster, rogue", ultimately from an older term meaning "journeyman, tradesman, small merchant". Compare Quandt.
Nickname for a clever person from Middle English cwointe/queynte meaning "intelligent, skilled" or "cunning, deceptive", as well as "wonderful, strange, unknown". Ultimately derived from Latin cognitus "known, recognised".