In Jain tradition, Anathi Muni is known as a prominent figure who attained liberation (moksha). According to Jain texts, his original name was "Anathi," which literally means "without a master" or "one who has no protector." He was so called because he had no relatives or supporters. Some Jain texts refer to him simply as "Anathi," and after taking diksha (initiation into monkhood), he became known as "Anathi Muni."

There is no specific mention in major Jain scriptures of a different "old name" before he became known as Anathi; rather, he is primarily remembered by this name due to the circumstances of his life. If you are referring to a particular version or story, please specify the context or the particular Jain text.