Tuesday, July 4, 2017
David's royal line was preserved when Jehosheba hid the child Joash so that Athaliah the queen could not kill him.
The marriage of Jehoshaphat's son to Ahab's daughter linked together the royal families of Israel and Judah. As a result, all the kings of Judah thereafter would be descended, not only from David, but from Ahab and Jezebel as well. And Matthew chapter 1 presents Jesus as an heir to that line of kings in Judah.
The Bible does not say that Jehosheba was the daughter of Athaliah, but only that she was the daughter of Jehoram of Judah.