Manasses III, Count of Rethel (1022 – 1065 or 1080[1]) was a son of Manasses II and his wife Dada (possibly Judith or Yvette de Roucy[2][3]).
He succeeded his father as Count of Rethel in 1032.
Little is known about his life, although he is mentioned often between 1048 and 1081.
Manasses III married Judith (born c. 1035), whose origins are unclear.
Several hypotheses have been proposed to clarify this: Judith and Manasses were the parents of: