'Twelfth' in the Bible

In the twelfth year that Joram, the son of Ahab, was king of Israel, Ahaziah, the son of Jehoram, king of Judah, became king;

In the twelfth year of Ahaz, king of Judah, Hoshea, the son of Elah, became king over Israel in Samaria, ruling for nine years.

And in the thirty-seventh year after Jehoiachin, king of Judah, had been taken prisoner, in the twelfth month, on the twenty-seventh day of the month, Evil-merodach, king of Babylon, in the first year of his rule, took Jehoiachin, king of Judah, out of prison;