Here are some Jain-friendly baby names starting with the letter M, with simple meanings:

For Girls (M):

• Mansi – mind, inner thoughts
• Manvi – one with a noble/wise mind
• Mira / Meera – devoted, full of loving devotion
• Madhvi – sweet, pleasant
• Malini – garland, fragrant and graceful
• Mitali – friendship, friendly nature ( jainknowledge.com)

For Boys (M) – with Jain touch:

• Mahavir / Mahaveer – great hero; name of 24th Tirthankar Bhagwan Mahavir ( jainknowledge.com)
• Munish – wise sage; like a muni (monk)
• Manan – contemplation, reflection
• Mihir – the sun; light, radiance
• Manav – human being; humane, kind
• Manit – highly respected, honored

If you tell me:

• boy or girl, and
• short (e.g. 2 syllables) or any special meaning you like (peace, knowledge, ahimsa, etc.),

I can suggest a very small, focused list for you.

You can also see a related Jain baby-name discussion here: