The first person of the Scandinavian Trinity, which consists of Har (the Mighty), the Like Mighty, and the Third Person. This Trinity is called “The Mysterious Three,” and they sit on three thrones above the Rainbow. The next in order are the AEsir (q.v.), of which Odin, the chief, lives in Asgard, on the heavenly hills between Earth and the Rainbow. The third order is the Vanir (see Van)—the gods of the ocean, air, and clouds—of which Van Niord is the chief. Har has already passed his ninth incarnation; in his tenth he will take the forms first of a peacock, and then of a horse, when all the followers of Mahomet will be destroyed.
in Indian mythology, is the second person of the Trinity.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
More on Har from Fact Monster: