The Historia fundationis cum fundatoris genealogia of the priory of Abergavenny names “Margaretam, Bertam et Luciam” as the three daughters of “Milonem” & his wife, adding that Margaret married “Humphredo de Boun” and inherited “comitatu Herefordiæ”. Her birth date range is estimated from the date of her parents' marriage and the likely birth date of her daughter Matilda. "…Margarita filia ipsi Mil…" subscribed the charter dated to [1123] records that "Walt de Gloec" gave Little Hereford in fee to "Willo de Mara nepoti suo". This document suggests that Margaret must have been her parents’s oldest child.
“Humfridus de Bohun regis dapifer et Marger. uxor mea” founded Farleigh Priory by undated charter. She certified the knights' fees made in the fee of her father during the time of King Henry I, which may imply that her husband had died by then. The Red Book of the Exchequer refers to "Margareta de Bohun xvii m" in Gloucestershire in [1167/68].
A manuscript which narrates the descents of the founders of Lanthony Abbey records the death 6 Apr 1187 of “Margeriam”, wife of “dominum Hunfredum de Bohun tertium” and her burial “in capitulo Lanthoniæ, juxta Gloucestriam”. A manuscript in Aske’s collections names “Milo…Erle of Herforde, Lord of Bricone and of all the Forest of Done, and also Constable of England…Sibbill wiff of the seid Milo…Ladi Margaret the furst begotton daughter of the said Milo…married to Humfre of Bohun the third…” among those buried at Lanthony Priory.... 1
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