What is XXX's brothers name?
Guy XIV de Laval
Guy XIV de Laval, François de Montfort-Laval, (28 January 1406 - 2 September 1486, Châteaubriant), comte de Laval, baron de Vitré and of La Roche-Bernard, seigneur of Gâvre, of Acquigny, of Tinténiac, of Montfort and Gaël, of Bécherel, was a French nobleman, known for his account of Joan of Arc.