See Exodus 6:15, Numbers 26:12,13, 1 Chronicles 4:24.
In Exodus 6:15 it is also Yemuel. However, in Numbers and Chronicles it is Nemuel. It is possible that the name was changed after they were in Egypt (cf. Sh'muel ben Chofni Gaon; Sekhel Tov; Lekach Tov on Numbers; Ramban ibid.; Teshuvoth Rashba 12, end).
These two are mentioned in Exodus, but not in Numbers. It appears that these tribes became extinct after the sin at Baal Peor (Numbers 25:9; cf. Rashi on Numbers 26:13; Bereshith Rabbah 99:7). In Chronicles, Yariv is substituted for Ohad and Yakhin. It is possible that the remnants of these two sub-tribes united to form a new group.
Identical to Zerach in Numbers and Chronicles (Rashi, Numbers; Teshuvoth Rashba loc. cit.).
He had the same name as King Saul. Some say that this Saul was an ancestor of Zimri (Numbers 25:14; Targum Yonathan; Sanhedrin 82b; HaKethav VeHaKabbalah).
Some say that this is mentioned because Simeon was the only one of the brothers to marry a Canaanite (Ibn Ezra; Radak). According to some ancient sources, her name was Adiva, and after Saul was born, Simeon took a wife from Aramaea like his other brothers (Yov'loth 34:20,21). According to other sources, Saul was the son of Dinah and Shechem, and he had been adopted by Simeon (Bertenoro; Bereshith Rabbah 80; Rashi; cf. Hirsch). Others translate it as, 'Saul who acted like the son of a Canaanite' (Sanhedrin 82b; Targum Yonathan).
See Exodus 6:16; 1 Chronicles 6:1.
Sometimes spelled Kohath. He was the grandfather of Moses.