Here are Jain-friendly boy names starting with B, with simple meanings:

1. Bahubali – Great strength of body and, more importantly, of spiritual courage; revered Jain śalākā‑puruṣa, ideal of non‑violence and detachment.
2. Bhadrabahu – Name of a famous Jain Āchārya; “one of auspicious (bhadra) wisdom (bahu).”
3. Bhavya – Auspicious, noble; one who is fit for liberation (a classic Jain meaning of bhavya jīva).
4. Bhavik – Devotional, spiritually‑minded; one whose intention is towards dharma.
5. Bhavesh – Lord of existence; master of life.
6. Bhaskar – Radiant like the sun; symbol of inner light of right knowledge.
7. Bhuvan – World, universe; often taken as “one whose vision is broad.”
8. Bhuvnesh / Bhuvanesh – Lord of the worlds; spiritually elevated being.
9. Bhadrak / Bhadrik – Auspicious, virtuous, fortunate.
10. Bhamandal – Name appearing in Jain Rāmāyaṇa tradition; carries a heroic, noble tone.

All these are acceptable in both Digambar and Shwetambar families; pronunciation and popularity may vary by region, but meanings stay essentially the same.

You can also see a related list of Jain names starting with B here