Maha Mrityunjaya Mantra has many forms as well as names. 1) Rudra Mantra - Since Rudra is one of the avatars of Lord Shiva, this mantra is also popular as the Rudra mantra. 2) Moksha Mantra - Chanting this mantra relieves the individual from the cycle of death and rebirth. Hence, this mantra also goes by the name Moksha Mantra.  3) Tryambakam Mantra - Since this mantra is addressed to Tryambaka, "The Three-eyed God", the mantra is also popular as Trayambakam Mantra.