Walter III Brisebarre[a] was a 12th-century Frankish nobleman who ruled successively as the lord of Beirut, lord of Transjordan, and lord of Blanchegarde in the Kingdom of Jerusalem. Walter inherited Beirut from his father, Guy Brisebarre, in 1157 and Transjordan from his father-in-law, Philip of Milly, in 1166. King Amalric forced Walter to cede Beirut to the crown to prevent a merger of two great fiefs. After the deaths of his wife Helena and their daughter, Beatrice, between 1167 and 1174, Transjordan passed to Helena's sister, Stephanie, and Stephanie's husband Miles of Plancy. Miles ruled the kingdom in 1174 in the name of the minor King Baldwin IV. He was murdered in October 1174 by assassins whom a later source names as the "lords of Beirut". Walter ended his career as the lord of Blanchegarde, a minor fief, but retained some influence at court until he died, probably in the early 1180s.
- ^ Nickerson 1949, p. 156.
- ^ Mayer 1990, pp. 868–869.
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