As a deity name
Name 772 of the Gayatri Sahasranāma — Devi Bhagavata Purana, as taught by Sages
Name 279 of the Saraswati Sahasranāma — Skanda Purana, as taught by Lord Brahma / Sages
As a Hindi name
No reading on this path — this spelling has no entry in our Hindi sources, and no near neighbour is attested there either. We say so rather than invent one.
As a Sanskrit word
Meaning
the chief wife of a king, &c. (˚vī-tva the rank of chief wife, )
Scripturally attestedWhy this matches what you typed
M1 · same meaning "mahādevyai" is the dative of "mahādevī" — the same word in a different grammatical case.
Dictionary citations
mahā—devī f. N. of Śiva's wife Pārvatī, MBh.; Hariv. &c. (RTL. 186)
of Lakṣmī, MBh.; R.
Caveats
Sources contain errors and engines have limits; every claim above carries its citation so you can verify it. This is guidance about names and their sources — not religious or astrological consultation. How we work · Our sources