His consorts were thirteen daughters of Daksa who bore him all kind of living creatures. From this, in Vedic literature, he became the origin of opposing forces by being a demiurge and the father of gods and demons (from the Aditi, Danu, Diti), mankind, and birds and serpents (from Vinara and Kadru).
His name stems, arguably, from the notion of the cosmos as a giant tortoise.
Some texts have him fathering the god Narada who also took a daughter of Daksa as a consort. (See also Prajapati) A.G.H.
Bowker, John, The Oxford Dictionary of World Religions, New York, Oxford University Press, 1997, pp. 538 Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 131-132