As a deity name
Name 635 of the Hanuman Sahasranāma — Rasvin Samhita / Brahmanda Purana, as taught by Lord Ram / Sages
Name 138 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
the sun, &c.
Scripturally attestedWhy this matches what you typed
M1 · same meaning "sahasrāṃśave" is the dative of "sahasrāṃśu" — the same word in a different grammatical case.
Dictionary citations
sahasrāṃśu mfn. th˚-rayed
sahasrāṃśu m. the sun, Mn.; MBh.; R. &c.
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