The adjective Gallic is applied to the French after Gaul, the ancient country now occupied by modern France and Belgium. But where does the word suave come from? That term, meaning "smoothly though often superficially gracious and sophisticated," has its origin in the Latin term for "sweet."

Although suave and debonair are sometimes used interchangeably, the adjectives are not synonymous. Suave suggests "an ability to deal with others easily and without friction," while debonair, from the French de bon aire, meaning "of good family or nature," connotes a grace, charm, or urbanity of manner or appearance.

When debonair was borrowed into English in the 13th century, it meant "gentle; courteous." Before that sense faded from currency in the 18th century, it had developed the modern meaning of debonair applied to Boyer.