He reigned three years in Jerusalem. His mother's name was Maachah the granddaughter of Abishalom.
1 Kings 15:2
Surrounding context
15:1 In the eighteenth year of King Jeroboam the son of Nebat, Abijam became king over Judah.
15:2 He reigned three years in Jerusalem. His mother's name was Maachah the granddaughter of Abishalom.
15:3 And he walked in all the sins of his father, which he had done before him; his heart was not loyal to the LORD his God, as was the heart of his father David.