Yasirah
Yasirah derives from the Arabic root ي س ر (Y-S-R) which relates to ease, facilitation, and comfort.
The exact name Yasirah is not a Quranic proper noun, although the root y-s-r (ease) occurs in Quranic vocabulary and themes.
Yasirah is attested in South and Southeast Asian Muslim communities, including Sindhi and Malay-speaking populations, in modern records and family usage.
Yes. 'Yasir' is the masculine form derived from the same root and is historically more common.
Yes. Since it derives from a virtuous semantic field (ease, facilitation) and does not ascribe divinity, it is appropriate within Islamic naming etiquette.