In Jain Dharma, 24 Tirthankars appear in every half-cycle of time.

So:

• Present cycle (Avasarpini) has its own 24 Tirthankars:

1. Ṛṣabhanāth 2. Ajitnāth 3. Sambhavnāth 4. Abhinandan Swami 5. Sumatināth 6. Padmaprabh 7. Supārśvanāth 8. Chandraprabh 9. Suvidhināth (Pushpadanta) 10. Śītalnāth 11. Śreyānsanāth 12. Vāsupūjya 13. Vimalnāth 14. Anantanāth 15. Dharmanāth 16. Śāntināth 17. Kunthunāth 18. Aranāth 19. Mallināth 20. Munisuvrat Swami 21. Namināth 22. Nemināth 23. Pārśvanāth 24. Mahāvīr Swami

• The past cycle also had 24 different Tirthankars, but they are not the same as the present cycle’s Tirthankars.

So the key point is:

Past cycle = different 24 Tirthankars Present cycle = our current 24 Tirthankars

If you want, I can also give the names of the 24 Tirthankars of the past cycle according to Jain tradition.