Hamilton made his senior international debut for Scotland last season after previously gaining age-group recognition with England.
He could face future club colleague Mauger in France as Scotland are drawn in the same pool as New Zealand, as well as Martin Castrogiovanni's Italy, Portugal and Romania.
Scotland RWC squad:
Forwards
John Barclay (Glasgow Warriors)
Kelly Brown (Glasgow Warriors)
David Callam (Edinburgh)
Ross Ford (Glasgow Warriors)
James Hamilton (Leicester Tigers)
Nathan Hines (Perpignan)
Allister Hogg (Edinburgh)
Allan Jacobsen (Edinburgh)
Gavin Kerr (Glasgow Warriors)
Scott Lawson (Sale Sharks)
Scott MacLeod (Llanelli Scarlets)
Euan Murray (Northampton Saints)
Scott Murray (Montauban)
Craig Smith (Edinburgh)
Simon Taylor (Stade Francais)
Fergus Thomson (Glasgow Warriors)
Jason White (Sale Sharks, captain)
Backs
Mike Blair (Edinburgh)
Chris Cusiter (Perpignan)
Rob Dewey (Ulster)
Marcus Di Rollo (Edinburgh)
Andrew Henderson (Glasgow Warriors)
Rory Lamont (Sale Sharks)
Sean Lamont (Northampton Saints)
Rory Lawson (Gloucester)
Dan Parks (Glasgow Warriors)
Chris Paterson (Gloucester)
Hugo Southwell (Edinburgh)
Nikki Walker (The Ospreys)
Simon Webster (Edinburgh)
