Joel

A warrior, in the time of the United Monarchy · named in 1 verse

the name means Jehovah (is his) God Strong's Lexicon

Joel, the brother of Nathan, was one of the mighty men who fought valiantly for King David.

From Easton's Bible Dictionary

The oldest of Samuel's two sons appointed by him as judges in Beersheba (1 Sam. 8:2). (See VASHNI.)

Easton's Illustrated Bible Dictionary, 1897 — public domain, quoted in full and unedited.

Siblings Nathan

From STEPBible's TIPNR genealogy data. A relationship the data marks uncertain is not shown here.