As a deity name
Name 977 of the Rama Sahasranāma — Padma Purana / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
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 great Viṣṇu, (esp. N. of Viṣṇu when worshipped by Buddhists, )
Scripturally attestedWhy this matches what you typed
M1 · same meaning "mahāviṣṇave" is the dative of "mahāviṣṇu" — the same word in a different grammatical case.
Dictionary citations
mahā—viṣṇu m. the great Viṣṇu, RāmatUp.; Cat. (esp. N. of Viṣṇu when worshipped by Buddhists, MWB. 215)
N. of Kapila, L.
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