Here are some nice baby girl names starting with “Y” that are commonly used in Jain/Sanskrit tradition, with simple meanings:

1. Yashvi / Yashvee – one who is full of fame, success
2. Yashika – one who brings glory, successful
3. Yashasvi – famous, victorious, respected
4. Yashaswini – blessed with glory and success
5. Yashna – worship, prayer
6. Yukti – wisdom, right method, intelligence
7. Yukta – disciplined, united, focused
8. Yogita – one who is skilful, spiritually inclined
9. Yoshita / Yosita – girl, lady
10. Yamini – night; also used for calmness and peace
11. Yauvani / Yauvanee – youthful, ever-fresh
12. Yashodara – bearer of fame (one who carries glory)

If you tell me any preferences (short name, very unique, very traditional, etc.), I can suggest a smaller, more focused list.