Ancestral File Number:<AFN> 9HMD-VF
Richard I, byname RICHARD The FEARLESS, French RICHARD SANS PEUR (b. c. 932--d. 996), duke of Normandy (942-996), son of William I Longsword.
Louis IV of France took the boy-duke into his protective custody, apparently intent upon reuniting Normandy to the crown's domains; but in 945 Louis was captured by the Normans, and Richard was returned to his people. Richard withstood further Carolingian attempts to subdue his duchy and, in 987, was instrumental in securing the French crown for his brother-in-law, the Robertian Hugh Capet. [Encyclopaedia Britannica CD '97]
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On the ancestry of the Grenville's and parents of Mauger, Count of Corbeil, their ancestor:
Richard I, Duke of Normandy (ggf through his eldest son of Robert II (The Devil), Duke of Normandy, who was in turn father by his mistress Harlette/Harlot of William I (The Conqueror); b 933; married 2nd his former mistress Gunnor and died 20 Nov 996, leaving [Mauger]. [Burke's Peerage, p. 1603]