William De Mainwaring 
William was born about 1110 in Tabley, Cheshire, England. William's father was Roger Mesnilwarin. His paternal grandfather was Ranulphus Mesnilwarin. He was an only child. William is no longer alive.
He had a biological son named Roger.
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Children
Roger De Mainwaring
Roger was born about 1130 in Warmingham, Cheshire, England. Roger is no longer alive.
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