Hamsa or Hansa (Sk.) “Swan or goose”, according to the Orientalists ; a mystical bird in Occultism analogous to the Rosicrucian Pelican. The sacred mystic name which, when preceded by that of KALA (infinite time), i.e. Kalahansa, is name of Parabrahm ; meaning the “ Bird out of space and time”. Hence Brahmâ (male)is called Hansa Vahana “the Vehicle of Hansa” (the Bird). We find the same idea in the Zohar, where Ain Suph (the endless and infinite) is said to descend into the universe, for purposes of manifestation, using Adam Kadmon (Humanity) as a chariot or vehicle.
Hamsa (Arab.). The founder of the mystic sect of the Druzes of Mount Lebanon. (See “Druzes” .)
Source: H.P.Blavatsky - The Theosophical Glossary