'House of Judah' in the Bible

When Rehoboam came to Jerusalem he assembled the house of Judah and Benjamin, one hundred and eighty thousand {chosen warriors}, to fight against Israel to restore the kingdom to Rehoboam.

And behold, Amariah the chief priest [is] over you in all matters of the word of Yahweh, and Zebadiah the son of Ishmael, the governor of the house of Judah, in all matters of the king, and the Levites [shall be] before you [as] officials. Be strong and do [well]! May Yahweh be with the upright."

Now [when] Athaliah the mother of Ahaziah saw that her son [was] dead, she arose and murdered all the {royal descendants} of the house of Judah.