As a deity name
Name 976 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
su—stanā or su—sta˚nī, (a woman) having beautiful breasts, Sch.
Scripturally attestedWhy this matches what you typed
M1 · same meaning "sustanyai" is the dative of "sustanī" — the same word in a different grammatical case.
Dictionary citations
su—stanā or su—sta˚nī, f. (a woman) having beautiful breasts, Pāṇ. iv, 1, 54, Sch.
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