Brown Driver Briggs

 Hadoram = "noble honour"
1. the 5th son of Joktan
2. a son of Tou, king of Hamath, was his father's ambassador to
congratulate David on his victory over Hadarezer, king of Zobah
3. the intendant of taxes under David, Solomon, and Rehoboam; called
also 'Adoniram' and 'Adoram'