Commentaire sur Les Juges 17:7

Of the clan of Yehudah. He was a Leivi maternally.¹⁴Paternally, he was descended from Yehudah. This explains why he was both “of the clan of Yehudah”, and a Levi. However, the Rabbis¹⁵Bava Basra, 109:b. interpret that, because he behaved like Menasheh,¹⁶The king who instituted idol worship throughout Eretz Yisroel. (Melachim 2, 21). who was descended from Yehudah, he is described as "of the clan of Yehudah." He was actually a Leivi, the son of Gershom, son of our master Moshe, as stated explicitly below, "Yehonasan, son of Gershom, etc."¹⁷