Here are some simple, meaningful Jain-friendly baby boy names starting with S:

Names from Tirthankars / Jain tradition

1. Shantinath – 16th Tirthankar; one who is full of peace.
2. Sumatinath – 5th Tirthankar; one with good intellect and wisdom.
3. Shreyans / Shreyansh – one who progresses on the right path; auspicious.
4. Shubham – auspicious, good, pure.
5. Siddharth – one who has attained his goal (name of Bhagwan Mahavir before Keval‑jnan).
6. Suri – from “Acharya Suri”; learned Jain monk, scholar.
7. Suhas – gentle smile, pleasant nature.
8. Shrenik – name of King Shrenik (Bimbisara), a famous Jain shravak.
9. Somil – peaceful, soft, gentle.
10. Sagaranand – one who finds bliss like an ocean, very happy at soul level.

Names from Jain values / virtues

1. Satvik – pure, calm, gentle by nature.
2. Sajjan – good-hearted, noble person.
3. Satya / Satyam – truth, follower of truth.
4. Shuchi – pure, clean (outer and inner purity).
5. Subodh – one who understands easily; wise.
6. Sumedh – good intellect, right understanding.
7. Suman – good-hearted, gentle.
8. Suyash – good fame earned by good deeds.
9. Suyog – good opportunity, favorable spiritual conditions.
10. Sahil – guide, shore; one who shows the right path.

Short & modern sounding

1. Samar – war against inner enemies (anger, ego, etc.).
2. Shaan – dignity, glory.
3. Saumil – friendly, soft, gentle.
4. Sarin – helpful, supportive.
5. Sarinay – one who leads in the right way.

If you tell me what you prefer (very traditional, modern, very short, or based on meaning like “peace” or “knowledge”), I can refine this to a smaller list of the best 5–10 names.