Tirthankaras are so-named because they were the founders of "tirtha". which were communities of Jainists said to act as a "ford across the river of human misery".
All the Tirthankaras are said to have been princes, who adopted asceticism; except for the 19th, which Svetambaras believe to have been a woman. Many scholars believe that only the last two Tirthankaras actually existed.
List of Tirthankaras