Mauger was the third eldest and probably eldest legitimate son of Roger I of Sicily

Roger I of Sicily

Roger I , called Bosso and the Great Count, was the Norman Count of Sicily from 1071 to 1101. He was the last great leader of the Norman conquest of southern Italy.-Conquest of Calabria and Sicily:...

. He was the son of his second wife, Eremburga of Mortain. His father made him count of Troina

Troina

Troina is a town and comune in the province of Enna, Sicily, Italy. It is located in the Nebrodi Park.-History:...

, but little else of him is known. He died after 1098, but when is uncertain and if he outlived his father he made no claim to the county of Sicily.

Sources

• Houben, Hubert (translated by Graham A. Loud and Diane Milburn). Roger II of Sicily: Ruler between East and West. Cambridge University Press
  Cambridge University Press
  Cambridge University Press is the publishing business of the University of Cambridge. Granted letters patent by Henry VIII in 1534, it is the world's oldest publishing house, and the second largest university press in the world...
  
  , 2002.
• Curtis, Edmund. Roger of Sicily and the Normans in Lower Italy 1016-1154. G.P. Putnam's Sons: London
  London
  London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...
  
  , 1912.