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Agatha DE FERRERS was born Abt 1234 in of Derbyshire, England, and died 22 May 1306 in England. She was the daughter of William DE FERRERS and Sibyl MARSHALL===family===She married Hugh DE MORTIMER, so...
AGNES . A manuscript narrating the foundation of Wigmore Abbey names “Edmundum primogenitum…Rogerum militem, Galfridum…Johannem…Katherinam…Johannam…Agnetam…Margaretam…Matildam… Blanchiam… et Beatricem”...
https://www.stirnet.com/genie/data/british/mm4fz/mortimer02.php (membership required to view without interruption; family of Essex, Herefordshire and Shropshire; also Norfolk and Fife/Ross/Perthshire cadet branches of aforementioned Herefordshire family)