Joah

also called Ethan · A Levite, in the time of the Divided Monarchy · Tribe of Levi · named in 2 verses

the name means Jehovahbrothered Strong's Lexicon

Joah (or Ethan), a Gershonite Levite, was the son of Zimmah in the genealogy of Levi.

From Easton's Bible Dictionary

Jehovah his brother; i.e., helper. (1.) One of the sons of Obed-edom (1 Chr. 26:4), a Korhite porter.

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

Parents Zimmah

Children Iddo

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

1 Chronicles 6:21 Joah his son, Iddo his son, Zerah his son, and Jeatherai his son.
1 Chronicles 6:42 the son of Ethan, the son of Zimmah, the son of Shimei,