C. F. Keil and Franz Delitzsch on 2 Chronicles 11:18-19

2Ch 11:18-19 2Ch 11:18-23, information as to Rehoboam’s family relationships. - 2Ch 11:18. Instead of בּן we must read, with the Keri, many MSS, lxx, and Vulg., בּת: Mahalath the daughter of Jerimoth, the son of David. Among the sons of David (1Ch 3:1-8) no Jerimoth is found. If this name be not another form of יתרעם,   1Ch 3:3, Jerimoth must have been a son of one of David’s concubines. Before the name אביחיל, ו must have been dropped out, and is to be supplied; so that Mahalath’s father and mother are both named: the daughter of Jerimoth the son of David, and Abihail the daughter of Eliab the son of Jesse, i.e., David’s eldest brother (1Ch 2:13; 1Sa 17:13). For Abihail cannot be held to be a second wife of Rehoboam, because 2Ch 11:19, “and she bore,” and 2Ch 11:20, “and after her,” show that in 2Ch 11:18 only one wife is named. She bare him three sons, whose names occur only here (2Ch 11:19).