Debonnaire \d(e)-bonnai-re, deb(on)-naire\ as a girl's name (also used as boy's name Debonnaire), is of French origin, and the meaning of Debonnaire is "urbane, nonchalant". May possibly be a Norman family name, meaning "of good lineage".

Debonnaire has 2 variant forms: Debonair and Debonaire.