The Brecknock lordship would eventually go to the de Bohuns by way of Eleanor de Braose, a descendant of Bertha who married the son of the 2nd Earl of Hereford.
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, grandson of the 2nd Earl of Hereford.