Answer

Yes. In Jain Dharma, every Tirthankar ultimately becomes a Siddha.

A Tirthankar does not become “vice versa” from Siddha. Rather:

• A soul first becomes a Tirthankar while still embodied.
• At the end of that final life, the Tirthankar attains Nirvana/Moksha.
• After Moksha, that liberated soul becomes a Siddha.

So, every Tirthankar becomes a Siddha, but every Siddha is not necessarily a Tirthankar.

Explanation

In Jainism:

• Tirthankar means a fully enlightened Arihant who establishes the fourfold Jain Sangh: monks, nuns, laymen, and laywomen.
• Siddha means a liberated soul who has destroyed all karmas and is free forever from birth, death, body, pain, and worldly existence.

A Tirthankar is still living in the world with a body after attaining Keval Gyan. When that life ends, the remaining non-destructive karmas are shed, and the soul rises to Siddhashila. Then that Tirthankar becomes a Siddha.

Every Tirthankar of This Kal Becomes Siddha

In the present Avasarpini kaal of Bharat Kshetra, there are 24 Tirthankars. All 24 attained Moksha and are Siddhas now.

Their names are:

1. Shri Rishabhdev / Adinath Bhagwan
2. Shri Ajitnath Bhagwan
3. Shri Sambhavnath Bhagwan
4. Shri Abhinandannath Bhagwan
5. Shri Sumatinath Bhagwan
6. Shri Padmaprabh Bhagwan
7. Shri Suparshvanath Bhagwan
8. Shri Chandraprabh Bhagwan
9. Shri Suvidhinath / Pushpadant Bhagwan
10. Shri Shitalnath Bhagwan
11. Shri Shreyansnath Bhagwan
12. Shri Vasupujya Bhagwan
13. Shri Vimalnath Bhagwan
14. Shri Anantnath Bhagwan
15. Shri Dharmanath Bhagwan
16. Shri Shantinath Bhagwan
17. Shri Kunthunath Bhagwan
18. Shri Aranath Bhagwan
19. Shri Mallinath Bhagwan
20. Shri Munisuvrat Swami Bhagwan
21. Shri Naminath Bhagwan
22. Shri Neminath Bhagwan
23. Shri Parshvanath Bhagwan
24. Shri Mahavir Swami Bhagwan

Important Understanding

The word Siddha is not limited only to Tirthankars. Countless souls have attained Moksha and become Siddhas. Some were Tirthankars, but many were not.

Examples traditionally remembered include:

• 24 Tirthankars
• Kevalis who attained Moksha
• Ganadhars who attained liberation
• Great monks and spiritually perfected souls who destroyed all karmas

But the complete list of all Siddhas cannot be given, because Siddhas are infinite in number.

Takeaway

A Tirthankar is a living enlightened Lord who shows the path of liberation. A Siddha is a completely liberated soul beyond the world. Every Tirthankar becomes a Siddha after Nirvana, but not every Siddha was a Tirthankar.