As a deity name
Name 16 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 goddess of sp˚, Sarasvatī, &c.
Scripturally attestedWhy this matches what you typed
M1 · same meaning "vāgdevyai" is the dative of "vāgdevī" — the same word in a different grammatical case.
Dictionary citations
vāg—devī f. the goddess of sp˚, Sarasvatī, Kāv.; Rājat. &c.
vāgdevī f. (-vī) A name of SARASVATĪ. E. vāk speech, and devī goddess, the goddess of eloquence.
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