William (de Vernon) de REVIERS, EARL OF DEVON
He married Mabel (Mabirie) de Beaumont, Countess of Devon Abt 1189 at of France . Mabel (Mabirie) de Beaumont, Countess of Devon was born at of Meulan, Normandy, France Abt 1168 daughter of Robert de Beaumont Count of Meullent and Maud de Dunstanville, Countess of Meullent .
They were the parents of 3
children:
Mary de Reviers
born Abt 1196.
Baldwin de Rivers
born Aft 28 Apr 1200.
Joan de Rivers
born Abt 1202.
William (de Vernon) de Reviers, Earl of Devon died 10 Sep 1217 .
Mabel (Mabirie) de Beaumont, Countess of Devon died Aft 1 May 1204 .