As a deity name
Name 268 of the Rama Sahasranāma — Padma Purana / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
Name 46 of the Surya Sahasranāma — Bhavishya 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
‘lord of voice or speech’, N. of a divine being (presiding over human life which lasts as long as there is voice in the body; applied to Soma, Viśva-karman, Prajā-pati, Brahmā &c.…
Scripturally attestedWhy this matches what you typed
M1 · same meaning "vācaspataye" is the dative of "vācaspati" — the same word in a different grammatical case.
Dictionary citations
vācas—pati (vācas-), m. ‘lord of voice or speech’, N. of a divine being (presiding over human life which lasts as long as there is voice in the body; applied to Soma, Viśva-karman, Prajā-pati, Brahmā &c., but esp. to Bṛhas-pati, who is lord of eloquence, preceptor of the gods, and regent of the planet Jupiter), RV.; AV. &c.
a master of speech, orator, BhP.
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