In The Tale of the Body Thief (1992), “Jason Hamilton” is the alias that Raglan James assumes after he thieves Lestat’s body and boards the Queen Elizabeth 2, staying in the Queen Victoria Suite. After Lestat repossesses his body and kills James, he also assumes the alias briefly.
For more perspectives on this alias, read the Alphabettery entries Lestat de Lioncourt, Queen Elizabeth 2, and Raglan James.