Another name for Mauger was Maliger.
Extract from "Biographia Britannica: Vol. 4" by W. Innys (1757)
The third son of Richard, the Hardy, and Gunnora was Maliger, or as it is commonly pronounced, Mauger, count of Corboile.
This Mauger, earl of Corboile, had a son, whose name was Hamon, who was slain in battle in the reign of his cousin Robert II, duke of Normandy.
His son was also called Hamon, surnamed le Dentu, in Latin Dentatus, who married the sister of the Emperor Otho, and by her had three sons, Robert, Richard, and Hamon, who all attended the Conqueror in his expedition into England, were present with him at the battle of Hastings; and marching with him afterwards into the West, to the siege of Exeter, Richard had bestowed upon him lands of considerable value, particularly the lordships of Biddeford in Devonshire, and of Kilkhampton in Cornwall.