Boyd’s Bible Dictionary:
Priests of the line of Aaron (1 Chron. 12:27), of whom Jehoiada was “chief,” or “leader,” in the time of King Saul (1 Chron. 27:5). They came to David at Hebron (1 Chron. 12:23).
Concise Bible Dictionary:
The descendants of Aaron (1 Chron. 12:27; 1 Chron. 27:17).
Jackson’s Dictionary of Scripture Proper Names:
patronymic of Aaron