As a deity name
Name 122 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
‘most fortunate’, N. of one of the wives of Yayāti (she was the daughter of Vṛṣaparvan and mother of Druhyu, Anu, and Puru; cf. under yayāti and deva-yānī), &c.
Scripturally attestedWhy this matches what you typed
M1 · same meaning "śarmiṣṭhāyai" is the dative of "śarmiṣṭhā" — the same word in a different grammatical case.
Dictionary citations
śarmiṣṭhā f. ‘most fortunate’, N. of one of the wives of Yayāti (she was the daughter of Vṛṣaparvan and mother of Druhyu, Anu, and Puru; cf. under yayāti and deva-yānī), MBh.; Kāv. &c.
śarmiṣṭhā N. of one of the wives of Yayāti and daughter of Vṛshaparvan, the king of the Daityas; cf. devayānī and yayāti.
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