William de Massey Lord Dunham Cheshire 1
- Born: 1232, Dunham Massey, Cheshire, England
- Marriage (1): Margery de Mainwaring Lady of Rostherne Cheshire
- Died: 1275, Dunham Massey, Cheshire, England at age 43
William married Margery de Mainwaring Lady of Rostherne Cheshire, daughter of Sir Robert de Mainwaring of Rosthorn Cheshire and Lady Alina Grendon. (Margery de Mainwaring Lady of Rostherne Cheshire was born about 1235 in Rostherne, Bucklow, Cheshire, England and died in 1300 in Cheshire, England.)
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