Kitto's Popular Cyclopedia of Biblial Literature
Adoniram or Hadoram, son of Toi, king of Hamath, who was sent by his father to congratulate David on his victory over their common enemy Hadarezer, king of Syria (1 Chronicles 18:10). This prince is called Joram in 2 Samuel 8:10.
A person of this name is mentioned as receiver-general of the imposts in the reigns of David, Solomon, and Rehoboam. Only one incident is recorded in connection with this person when the ten tribes seceded from the house of David, and made Jeroboam king, Rehoboam sent Adoniram among them, for the purpose, we may presume, of collecting the usual imposts, which had become very heavy. Perhaps he had been rigid in his invidious office under Solomon: at all events the collector of the imposts which had occasioned the revolt was not the person whose presence was the most likely to soothe the exasperated passions of the people. They rose upon him, and stoned him till he died (1 Kings 12:18).
Kitto, John, ed. Entry for 'Adoniram'. "Kitto's Popular Cyclopedia of Biblial Literature". https://www.studylight.org/encyclopedias/eng/kbe/a/adoniram.html.