William de Mainwaring
was born at Warmingham, Cheshire, Eng 1276.
His parents were Roger de Mainwaring and Mrs-Roger de Mainwaring.
He married Agnes de Adrerne
Agnes de Adrerne
was born at Alford, Lincoln, Eng 1276
daughter of Peter de Arderne, Knight and Margaret or Margery
They were the parents of 2
Matilda de Mainwaring
born Abt 1310.