White, Graeme. Bohun, Humphrey de (b. before 1144, d. 1181). In Oxford Dictionar...
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White, Graeme. Bohun, Humphrey de (b. before 1144, d. 1181). In Oxford Dictionary of National Biography (ODNB). United Kingdom: Oxford University Press (2012), citing, “Through his marriage, which took place between February 1171 and Easter 1175, to Margaret (d. 1201), daughter of Henry of Scotland, earl of Northumberland (d. 1152), and widow of Conan (IV), duke of Brittany (d. 1171), he became brother-in-law to the king of Scots. He died while a member of the army led into France towards the end of 1181 by Henry II's sons to assist Philippe II against the count of Flanders, and was buried atLlanthony (Secunda) Priory, Gloucestershire. He left a daughter, Matilda, and a son, Henry de Bohun, who in 1187 was a minor in the custody of Margaret de Bohun, the widow of Humphrey (II) de Bohun.”https://doi.org/10.1093/ref:odnb/2774.