Vaillancourt Family History
Vaillancourt Name Meaning
Altered form of French Willencourt (via the intermediate form Villencourt): habitational name from Willencourt a place in Pas-de-Calais derived from medieval Latin Willani curtis denoting an estate of a certain Willo. The surname Willencourt is very rare in France.
Source: Dictionary of American Family Names 2nd edition, 2022