Here are some nice Jain / Sanskrit-based baby girl names starting with the letter M (M):

Short & very simple names (2–3 syllables)

1. Mahi – earth, the world
2. Mira / Meera – devotee, one who is absorbed in bhakti
3. Miraali / Mirali – gentle, soft
4. Mili – meeting, union
5. Mina / Meena – a precious stone, also “fish” (symbolically gentle)
6. Mita / Meeta – friend, measured, moderate
7. Mona – peaceful, also “silence” (Maun)
8. Manya – worthy of honor, respected
9. Miraaya / Miraya – devoted one
10. Mishti / Mishthi – sweet

Names with clear spiritual / good-virtue meanings

1. Mahika – earth, dew, purity
2. Mahima – greatness, glory (of the soul / dharma)
3. Mahita – honoured, respected
4. Manasi / Manasi – related to the mind, pure thoughts
5. Manavi – humane, compassionate
6. Manjiri – a bud, small flower (symbol of blossoming virtues)
7. Manushi – good-hearted, human, gentle being
8. Maitreyi / Maitri – friendship, loving-kindness (maitrī is an important Jain virtue)
9. Mrunal / Mrinal / Mrinalini – lotus, purity rising above impurities
10. Madhavi – sweet, gentle, spring creeper (symbol of beauty and softness)

Names linked to peace, knowledge, light

1. Medha – intelligence, wisdom
2. Medhavi – very wise, intelligent
3. Manjushree / Manjushri – one with a gentle, beautiful radiance
4. Mugdha – innocent, simple, pure
5. Mahika / Mahira – skilled, talented, noble
6. Manorama – pleasing mind, delightful
7. Manshi / Manshi – spiritual / of the mind, thoughtful
8. Mansi / Maansi – one whose mind is pure
9. Mishika – love, gift of God (often used for pure, sweet nature)
10. Mokshini – related to moksha, one who moves towards liberation (more rare but very Jain-meaningful)

Names inspired by Jain culture/history (loose connection)

1. Mahavee / Mahavi / Mahavini – inspired by “Mahavir” (Lord Mahavir) – you can choose a soft feminine form you like
2. Mallika – jasmine flower (Mallinath is 19th Tirthankara; name “Mallika” sounds similar and is a pure, sweet flower name)
3. Mrigaa / Mrigavati – deer-like, gentle, soft-hearted

You can pick a name whose meaning you like most. From a Jain point of view, names connected to virtues (like Maitri, Medha, Mahima, Manavi, Mokshini) are especially beautiful, because every time we call the child, we also remember that virtue.