Judaism is the world's oldest Abrahamic religion. There are about 15 million followers who are called Jews. It is the oldest monotheistic religion, teaching the belief in one God. Both Christianity and Islam have similarities with Judaism.
Considering this, who is a rabbi in Judaism?
Rabbi, (Hebrew: “my teacher,” or “my master”), in Judaism, a person qualified by academic studies of the Hebrew Bible and the Talmud to act as spiritual leader and religious teacher of a Jewish community or congregation.
What is the religious leader of Islam called?
Imam. Imam is an Arabic word meaning "Leader". The ruler of a country might be called the Imam, for example. The term, however, has important connotations in the Islamic tradition especially in Shia belief.