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).

See where Ahitub occurs in the Bible...

Definition of Ahitub:
"brother of goodness"