Maachah. Her other name was Michaiah (2 Chronicles 13:2).
Absalom. Same as Abishalom (1 Kings 15:2).
Related Commentaries of 2 Chronicles 11:20
2 Chronicles 11:20
20 And after her he took Maachahb the daughter of Absalom; which bare him Abijah, and Attai, and Ziza, and Shelomith.