Here are some Jain baby names starting with M:

Boy names

• Mahavir — great hero; name of Bhagwan Mahavir
• Moksh — liberation, freedom from karmas
• Munisuvrat — name of the 20th Tirthankar
• Mangal — auspicious, blessed
• Manasvi — wise, intelligent
• Mahendra — great lord, powerful
• Mudit — joyful, happy
• Maanav — human, noble being
• Manan — reflection, contemplation
• Mrigank — moon

Girl names

• Mokshada — giver of liberation
• Mahima — greatness, glory
• Madhavi — sweet, graceful
• Maitri — friendship, loving-kindness
• Mokshi — one who seeks liberation
• Manisha — wisdom, thought
• Mridula — soft, gentle
• Minal — precious gem
• Mayuri — peahen, graceful
• Mokshita — liberated, freedom-seeking

Unisex names

• Maitri — compassion and friendship
• Manan — deep thinking
• Moksh — liberation
• Mudit — joyful

If you want, I can also give:

• modern Jain names starting with M
• traditional Sanskrit Jain names starting with M
• names inspired by Bhagwan Mahavir and Tirthankars