William [Lord of Sefton] DE MOLYNEUX
He married Margaret de Thornton at of Sefton, Lancashire, England . Margaret de Thornton was born at Lancashire, England Abt 1212 daughter of Allen (Allan) de [Sir Knight] Thornton and Alicia Bickerstaff .
They were the parents of 4
children:
Richard de [Lord of Sefton] Molyneux
born Abt 1232.
Roger Molyneux
born Abt 1237.
Simon de Molyneux
born Abt 1239.
William de Molyneux
born Abt 1241.
William [Lord of Sefton] de Molyneux died Abt 1289 .