• No. Ravana (Ravan) is not a Tirthankar in Jainism. The 24 Tirthankaras of the current half-cycle (Avasarpini) are fixed and Mahavira is the 24th and last Tirthankar of this cycle. You can read more here and here .

• The 24 Tirthankaras of the present cycle (in order) are:

1) Rishabhdev (Adinath) 2) Ajitnath 3) Sambhavnath 4) Abhinandan Nath 5) Sumatinath 6) Padmaprabhu 7) Suparshvanath 8) Chandraprabhu 9) Pushpadanta (Suvidhinath) 10) Shitalnath 11) Shreyansh (Shreyanshanath) 12) Vasupujya 13) Vimalnath 14) Anantanath 15) Dharmanath 16) Shantinath 17) Kunthunath 18) Aranath 19) Mallinath 20) Munisuvrat 21) Naminath 22) Neminath 23) Parshvanath 24) Mahavir (Vardhamana). ( jainworld.jainworld.com)

• If you want, I can also give brief notes on each Tirthankar’s key teachings or symbols. ( jainworld.jainworld.com)