1 Chronicles 3:18,19 - Joseph Benson’s Commentary on the Old and New Testaments

Malchiram also, and Pedaiah These were the sons of Salathiel: and there is therefore something to be supplied, to make the sense of this verse plain; namely, The sons of Salathiel were Malchiram, &c. The sons of Pedaiah, Zerubbabel, &c. But, Luke 3:27, Zerubbabel is called the son of Salathiel; and therefore he must have been the son of Pedaiah only by adoption; or else Salathiel dying without children, Pedaiah begat Zerubbabel of his wife, and so raised up seed to his brother. Thus Zerubbabel was the son of Pedaiah, because begotten by him, and yet the son of Salathiel, because begotten of his wife to be his heir. Shelomith their sister Sister to the last two named sons of Zerubbabel, namely, by both parents; and therefore named before the other five, (1 Chronicles 3:20,) who were her brethren by the father, but not by the mother.