Desharnais Family History
Desharnais Name Meaning
Altered form of French Dehornay itself an altered form of Dehornoy: habitational name with fused preposition de ‘from’ denoting someone from Hornoy a place in Somme. The surname Dehornoy is rare in France (it is found mainly in Seine-Maritime) while the surname Dehornay has apparently died out.
Source: Dictionary of American Family Names 2nd edition, 2022