Zechariah 12:12

12:12 The land will mourn, clan by clan – the clan of the royal household of David by itself and their wives by themselves; the clan of the family of Nathan ¹  by itself and their wives by themselves;

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¹ sn By the time of Zechariah the line of descent from David had already been transferred from the Solomon branch to the Nathan branch (the clan of the family of Nathan). Nathan was a son of David (2 Sam 5:14) through whom Jesus eventually came (Luke 3:23-31). Matthew traces Jesus’ ancestry back through Solomon (Matt 1:6-16) but apparently this is to tie Joseph into the Davidic (and thus messianic) line. The “official” descent of Jesus may be viewed as passing through Solomon whereas the “physical” descent came through Nathan.