John Gill Commentary 1 Chronicles 8

Now Benjamin begat Bela his firstborn See (1 Chronicles 7:6). The genealogy of the tribe of Benjamin is reviewed, because it joined and kept close with Judah in the worship of God, went into captivity, and returned out of it with it; and this review is made chiefly for the sake of Saul, and his posterity, the first king of Israel, who was of it, and in whose posterity this genealogy ends.

Ashbel the second; supposed to be the same with Jediael, (1 Chronicles 7:6), see (Genesis 46:21).

and Aharah the third; the same with Aher, (1 Chronicles 7:13), and with Ahiram, (Numbers 26:38).

Nohah the fourth, and Rapha the fifth .
] Nohah is supposed by some to be the same with Becher, (1 Chronicles 7:6) and by others with Naaman, (Genesis 46:21) , as Rapha, the same with Rosh there.

The sons of Bela were Addar, and Gera, and Abihud .
] The first of these is thought to be the same with Ard, mentioned among the sons of Benjamin, (Genesis 46:21) but was one of his grandsons, see (Numbers 26:40) as Gera also was.

These were all the sons of Bela; one of the name of Naaman is reckoned among the sons of Benjamin, (Genesis 46:21) and from this grandson the family of the Naamanites are named, (Numbers 26:40) , and Ahoah is by some thought to be the same with Ehi, mentioned in (Genesis 46:21) as one of Benjamin's sons. Some take the three last to be the sons of Ehud, spoken of in the next verse; but Shephuphan and Huram seem to be the same with Shupham and Hupham, (Numbers 26:39) .

(See Gill on 1 Chronicles 8:4).