As a deity name
Name 897 of the Gayatri Sahasranāma — Devi Bhagavata Purana, as taught by 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
patr. fr. viṣṇu
Scripturally attestedWhy this matches what you typed
M1 · same meaning "vaiṣṇavyai" is the dative of "vaiṣṇavī" — the same word in a different grammatical case.
Dictionary citations
Monier-Williams (1899) · वैष्णवी (linked stem)
vaiṣṇavī (ī), f. patr. fr. viṣṇu, MBh.
Monier-Williams (1899) · वैष्णवी (linked stem)
a female worshipper of Viṣṇu, Pañcar.
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