As a deity name
Name 435 of the Hanuman Sahasranāma — Rasvin Samhita / Brahmanda Purana, as taught by Lord Ram / Sages
Name 163 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
Speaking truth. E. satya truth, and vādin who speaks.
Scripturally attestedWhy this matches what you typed
M1 · same meaning "satyavādine" is the dative of "satyavādin" — the same word in a different grammatical case.
Dictionary citations
satya—vādin mfn. = -vācaka, AV.; Br.; Mn. &c.
satya—vādin m. N. of Kauśika, MBh.
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