Humphrey de Bohun
The Brecknock lordship would eventually go to the de Bohuns, by way of Eleanor de Braose. Eleanor, a descendant of Sibyl's through Bertha of Hereford, married Humphrey de Bohun, son of the 2nd Earl of Hereford. Eleanor and Humphrey's son, Humphrey de Bohun, succeeded his grandfather to the titles in 1275.