Guy IX de Laval (c. 1270 – 22 January 1333) was a member of the House of Laval.
He was Seigneur de Laval and d'Acquigny, of Beaumont-du-Gâtinais, Viscomte de Rennes, Comte de Caserte in Campania and Baron de Vitré.
Guy IX was the son of Guy VIII de Laval and Isabelle de Beaumont-Gâtinais[1] In 1297 he married Béatrix de Gavre,[1] countess of Falkemberg, only daughter of Rasès de Gavre.
Children: