Saniyyah
Saniyyah comes from the Arabic adjective sanī (سَنِيّ) meaning 'exalted, lofty, splendid.' As a given name it conveys honor and high status.
No. Saniyyah is not mentioned as a proper noun in the Quran; it is a classical Arabic adjective used as a given name.
Yes. Saniyyah is linguistically Arabic and readily used in Urdu naming practice; it is seen as a refined and scholarly choice.
Pronounced sa-NEE-yah (IPA: /saˈniː.ja/), with stress on the second syllable.
The masculine adjective is sanī (سَنِيّ). As a masculine given name one may encounter Sanī or Sani in some traditions, though forms vary by language.