From Kook Science
A transmigrant, or walk-in, is a possessing entity that takes over the physical body of a human host, sometimes for the rest of the life of the host; as distinguished from trance mediumship, where the host is temporarily usurped by the possessing entity, and reincarnation, where the soul is thought to pass from one life to another. Our use of the term is borrowed from William S. Burroughs, who wrote of a form of transmigration in his 1981 novel Cities of the Red Night.
By their own accounts
The following persons claimed to be transmigrants:
- T. Lobsang Rampa, a Tibetan lama who inhabited the body of Cyril Henry Hoskin (1910-1981);
- Vivenus, a Venusian woman who possessed her own "Earth double";
- Sol du Naro, a Saturnian man who incarnated in the body of a deceased one-year-old named Howard Menger (1922-2009), and thereafter lived as Menger;
- Prince Neosom, an interplanetary traveller from the planet Tythan, who was at some point living as Lee Childers;
- Edward Cameron, an American time traveller associated with the Philadelphia Experiment who inhabited the body of Alfred D. Bielek (1927-2011);
- Nommos, an extraterrestrial from the planet TaoPao (in the Sirius system), who inhabited the body of Paul Wellmer in 1946.
- Montgomery, Ruth (1984), Strangers Among Us: An Astonishing Revelation of the Enlightened Beings Who Have Come to Lead Us Into a Bold New Age, Fawcett, https://www.amazon.com/Strangers-Among-Us-Ruth-Montgomery/dp/044920801X?tag=apopheniacs-20 — one of the key texts for the New Age interpretation of walk-ins