Ahitub in Easton's Bible Dictionary

brother of goodness = good. (1.) The son of Phinehas. On the death of his grandfather Eli he succeeded to the office of high priest, and was himself succeeded by his son Ahijah (1 Sam. 14:3; 22:9, 11, 12, 20). (2.) The father of Zadok, who was made high priest by Saul after the extermination of the family of Ahimelech (1 Chr. 6:7, 8; 2 Sam. 8:17).

Link: https://bible-history.com/eastons/A/Ahitub/