Here are short, unique Jain-friendly girl names starting with M:

• Mansi — meaning “mind” or inner thought
• Manvi — meaning “one who has a strong mind” or “wise mind”
• Meera / Mira — often used for devotion and grace
• Madhvi — meaning “sweet” or “lovely”
• Malini — a simple, graceful name meaning “garland” or “fragrant”
• Mitali — meaning “friendship” or “friendly nature”

If you’d like, tell me preferred meanings (e.g., strength, kindness, learning) and I’ll tailor a few more options.