'Ancestor' in the Bible

Then a letter came to Jehoram from Elijah the prophet, saying:This is what Yahweh, the God of your ancestor David says: “Because you have not walked in the ways of your father Jehoshaphat or in the ways of Asa king of Judah

He did what was right in the Lord’s sight just as his ancestor David had done.

He did what was right in the Lord’s sight and walked in the ways of his ancestor David; he did not turn aside to the right or the left.

In the eighth year of his reign, while he was still a youth, Josiah began to seek the God of his ancestor David, and in the twelfth year he began to cleanse Judah and Jerusalem of the high places, the Asherah poles, the carved images, and the cast images.