Isabel Stafford, Countess of Bramshall

https://www.wikitree.com/wiki/Stafford-953

His [Sir William of Sandon & Bramshall's] son William Jr. married Isabel Stafford, dtr. and h. of Robert de Stafford and Gundred de Stafford, dtr. ofSir William and his first wife Ermentrude fitzWalkeline. They had five sons: James, John (of Bramshall), Edmund, William, and Walter.

"The father, Sir William de Stafford 9c. 1225-58), had married first Ermentrude, daughter and co-heiress of William FitzWalkelin, before 1252; and was the son and heir of Sir William de Stafford (c. 1195-1240), who was himself the second son of the whole blood of Hervy Bagot of Bramshall and melicent de Stafford, the heiress of the Stafford Barony. So that our Sir William, the first M.P. for Staffordshire, was second cousin to the contemporary Lord Stafford, and his grandsons, Sir James and Sir John, were fourth cousins of the great Earl Stafford whose sister and daughter they respectively married."