New Defender's Study Bible Notes
6:17 sons of Gershon. In Exodus 6:16-19, the genealogy from Levi to Moses through Kohath and Amram is abbreviated to just four generations, although the stay in Egypt is said to be 430 years (Exodus 12:40-41). Note, however, that approximately this same period from Ephraim (a son of Joseph) to Joshua involved ten generations (I Chronicles 7:22-27). It is thus possible that the Levi-to-Moses genealogy gave only the four “major” ancestors of Moses, corresponding roughly to the 430-year stay of Israel in Egypt. However, see also the notes on Genesis 15:16.