Bhumi Devi's pairing with the sky belongs to one of the oldest reconstructable patterns in Indo-European religion, not only an Indian one. Her Vedic form, Prithvi, is regularly invoked together with Dyaus, the sky, as Dyava-Prithivi, father sky and mother earth, a linked divine couple addressed jointly in Rigvedic hymns as the parents of the gods and of the world. Comparative philologists have long linked the name Dyaus to the same Proto-Indo-European root that produced the Greek Zeus, the Roman Jupiter, by way of Dyeus pater, sky father, and the Germanic Tyr, making Dyaus one of the clearest cases in which Sanskrit preserves, largely intact, a divine name that also survived, transformed by regular sound change, in languages spoken thousands of miles away and worshipped under entirely different mythologies.
Prithvi herself has no such widely reconstructed cognate name outside India, but the structural pairing she forms with Dyaus, sky father and earth mother as the primal generative couple, recurs across the Indo-European world in figures such as the Greek Ouranos and Gaia, suggesting that the specific names diverged while the underlying theological architecture, two parents whose union produces the ordered world, was inherited rather than separately invented. Bhumi Devi's later absorption into Vishnu's household as a consort represents a specifically Puranic development layered onto this much older inherited pairing.