Margaret of Britain Viscountess (1392–1428) Parents Joan of Navarre John V, Duke of Brittany Children Marguerite of Rohan Beatrix de Rohan Jeanne de Rohan Catherine de Rohan Alain de Rohan Siblings Blanche of Brittany Marie of Brittany, Lady of La Guerche Richard, Count of Étampes Arthur III, Duke of Brittany John V Jeanne de Bretagne Partners Alain IX de Rohan