Here are simple Jain-friendly baby boy names starting with P, with easy meanings:

1. Parshva / Parshvanath – Name of the 23rd Tirthankar; one who has conquered passions.
2. Prabhav – Influence, radiance.
3. Prakash – Light, brightness.
4. Praveen – Skilled, expert.
5. Pranav – Sacred sound/mantra; pure holy chant.
6. Prashant – Calm, peaceful.
7. Pratap – Glory, courage.
8. Praful – Blossoming, like a flower.
9. Punya – Merit, virtue; result of good deeds.
10. Piyush – Nectar, something very sweet and pure.
11. Pankaj – Lotus; purity and beauty.
12. Pragyan – Wisdom, good understanding.
13. Purushottam – The best among people; supreme person.

For a name with strong Jain dharmic connection, the best from this list is:

• Parshva / Parshvanath – directly from Tirthankar’s name.
• Punya – very close to Jain principle of earning punya by good karma.

You can read more similar suggestions here