Which spouse of Robert was her mother is not clear. Some sources show her as the daughter of Robert I of France. (Directory of royal genealogical data - WWW site).
Descendants given in Browning, Charles H. Americans of royal descent, 7th ed. Baltimore : Genealogical Pub. Co., 1986, pg. 346, 372, 430, 467.
The couple had four children (Douglas, William C. William the Conqueror : the Norman impact upon England. Berkeley, Cal. : U. of California Press, c1964, pg. 391). Some descendants listed in Browning, Charles H. Americans of royal descent, 7th ed. Baltimore : Genealogical Pub. Co., 1986, pg. 503-506.