Garnier is a surname commonly found in France and Quebec, originally from the first name Garnier of Germanic etymology Warin-hari, like Werner.
Garnier de Nablus was a master of the Knights Hospitalier, commander under Richard I in the Third Crusade.
Local and dialectal French variations include Gasnier, Grenier, Guernier, Varnier, Vernier, Warnier, Warniez, Wargniez, Wargnier and Warnéry.
Garnier is a common name in France, although not as much in Quebec.
The name came to Maastricht through Wallonia in the 17th century and spread across the country from there.