William de Mohun

  General Notes:

WILLIAM de Mohun (-1155 or before). A charter of King Henry I confirmed the foundation and possessions of Bridlington priory, including the donation of "ecclesiam de Wicheforda" made by "Willielmus de Moion et uxor eius Agnes". The 1130 Pipe Roll records "Willo de Moiont" in Warwickshire. Henry of Huntingdon names "William de Mohun" among the "traitors" who supported Empress Matilda in 1138, adding that he held "the castle at Dunster" against the king. The Gesta Stephani Regis names "Willelmus de Mohun quem comitem ibi statuit Dorsetiæ" among the supporters of Empress Matilda in the English civil war. He was created Earl [of Somerset/Dorset] by Empress Matilda in [Apr/Jun] 1141: "…com W[illelmo] de Moion…" subscribed the charter dated to midsummer 1141 under which Empress Matilda granted property to Geoffrey de Mandeville. "Willielmus de Moyne comes Somersetensis" founded Bruton priory in Somerset by undated (but dated to 1142 by Maxwell-Lyte) charter witnessed by "Willielmo filio meo, Henrico, Juwanno, Petro, et Ricardo clericis…". "Willelmus de Mohun" confirmed a grant to "Willelmo filio Durandi" by charter dated to [1150], witnessed by "Eudone fratre meo…".

m AGNES, daughter of ---. A charter of King Henry I confirmed the foundation and possessions of Bridlington priory, including the donation of "ecclesiam de Wicheforda" made by "Willielmus de Moion et uxor eius Agnes". The parentage of Agnes is not known. Maxwell-Lyte suggests "with some confidence" that she was Agnes de Gand, daughter of Walter de Gant & his wife Mathilde de Penthièvre. He bases this on the possession by Gilbert de Gand of Whichford, Warwickshire (then in Northamptonshire) in 1086, Gilbert´s son Walter´s foundation of the priory at Bridlington, and the donation by William de Mohun and Agnes his wife of the church of Whichford to Bridlington.

William & his wife had six children: Ralph, William, Henry, Iwan, Peter and Richard. ¹

William married Agnes de Gand, daughter of Walter van Gent and Mathilde de Penthièvre.¹