Son and heir of William Mainwaring of Over m. 1272/3 Magaret de Toft. Died in his father's lifetime. He married Christian de Birtles. They had two known children: William and Joan (married Robert de Fallybrone of Birtles, Cheshire).
Sources
The History of the County Palatine and City of Chester (1882), Ormerod, George, vol. 1 p. 479;
A short history of the Mainwaring family (1890), Finley, Reginald Mainwaring, (1890. Facsimile reprint, London: The Research Publishing Co., 1976), p. 30;
Genealogy of ShropshireItalic text [by Joseph Morris] (filmed 1966), vol. 3 p. 1117.
Ormerod, G., King, D., Smith, W., Webb, W. & Leycester, P. (1882). The History of the County Palatine and City of Chester: Comp. from Original Evidences in Public Offices, the Harleian and Cottonian Mss., Parochial Registers, Private Muniments, Unpublished Ms. Collections of Successive Cheshire Antiquaries, and a Personal Survey of Every Township in the County; Incorporated with a Republication of King's Vale Royal and Leycester's Cheshire Antiquities. (Vol 1, pp.501-502). Cheshire, England: G. Routledge. Google Books.
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