- Born: Abt 1285, Davenport, Cheshire, England
- Marriage: William Mainwaring of Over Peover
Noted events in her life were:
• Background Information. 713
William Mainwaring of Over-Peover, was the heir to his grandfather, also named William. His parents were Roger Mainwaring and Christian Birtles. He married Mary, daughter of Henry Davenport, and they had a son named William, and a son named Roger. Their daughters were Margery and Millicent, all living in 1334. William died about 12 or 13 Edward III.
~George Ormerod's The History of County Palatine and City of Chester, Vol I, p. 478
Mary married William Mainwaring of Over Peover, son of Roger Mainwaring and Christian de Birtles. (William Mainwaring of Over Peover was born over Peover, Cheshire, England and died over Peover, Cheshire, England.)