Vallier is a topographic surname of French and Old English origin, referring to someone who lives in a valley. Variants include Vallière, Vallières, de Vallière, and LaVallière. Notable people with the surname Vallier include: * John Vallier (1920–1991), English classical pianist and composer * Joseph Vallier (1869–1935), French lawyer and politician * Lenny Vallier (born 1999), French footballer * Willy Vallier (1920-1968), Italian (Südtirol) artist Notable people with the surname Vallière include: * Jean Vallière (died 1523), Augustinian monk * Louis-Florent de Vallière (1719–1775), Governor General of the French colony of Saint-Domingue (Haiti)

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