Levi in Wikipedia

Levi/Levy, Standard Levy Tiberian Lēwî ; "joining") was, according to the Book of Genesis, the third son of Jacob and Leah, and the founder of the Israelite Tribe of Levi (the levites); however some Biblical scholars view this as postdiction, an eponymous metaphor providing an aetiology of the connectedness of the tribe to others in the Israelite confederation[1]. Certain religious and political functions were reserved for the Levites, and, according to textual scholars, the early sources of the Torah - the Jahwist and Elohist - appear to treat the term Levi as just being a word meaning priest; some scholars suspect that "levi" was originally a general term for a priest, and had no connection to ancestry, and that it was only later, for example in the priestly source and Blessing of Moses, that the existence of a tribe named Levi became assumed, in order to explain the origin of the priestly caste[2][3]...

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