Dictionary of Medieval Names
from European Sources

Debonair m. Old French debonaire, from Old French de bon aire 'noble, of good stock'.

France
Old French
1313 Debonnere Paris1313 p. 38
Cite as: S.L. Uckelman. "Debonair". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Debonair.