“The sons of Ephraim were Shuthelah, and Bered his son, Tahath his son, Eleadah his son, Tahath his son, Zabad his son, Shuthelah his son, and Ezer and Elead.”
The second son of Joseph Ephraim was the favorite son, who had 3 sons, According to Numbers, chapter 26, Shuthelah, the clan of the Shuthelahites, Becher, the clan of the Becherites, Tahan, of the clan of the Tahanites. Ephraim got the special blessing from Jacob in Genesis, chapter 48. Obviously, it was also the name of a territory in Canaan. According to Numbers, (1) (7) Shuthelah was the name of the son of Ephraim, the main group of Ephraim. (2) Bered was a place in Canaan and also the son of Ephraim. He may also be the same as Becher in Numbers. There are 2 sons named (3) (5) Tahath. One may be the Tahan mentioned in Numbers, while the other might be grandson. This presentation here is a little awkward. (4) Eleadah and (9) Elead are only mentioned here. It is not clear whose son they are. There are 6 people with the name of (6) Zabad and he is related to Tahath somehow. There are also 5 people with the name of (8) Ezer. Both Zabad and Ezer are names of Benjaminites, so that may be the cause of this confusion.