Yahudi is a term that refers to the Jewish people, who are adherents of Judaism. The term Yahudi is derived from the Hebrew word Yehudi, which originally referred to the people of the Israelite kingdom of Judah. In ancient times, Yahudi referred to the Yahudah tribe or people of the Yahudah domain. The Jewish people were initially called Hebrews and later Israelites from the time of their entrance into the Holy Land to the end of the Babylonian Exile. Today, the Jewish people are a worldwide group with a population of 15.2-19.9 million.