'Royal' in the Bible

Who should not fear you, King of the nations? For it appertains to you; because among all the wise men of the nations, and in all their royal estate, there is none like you.

Now it happened in the seventh month, that Ishmael the son of Nethaniah, the son of Elishama, of the seed royal and [one of] the chief officers of the king, and ten men with him, came to Gedaliah the son of Ahikam to Mizpah; and there they ate bread together in Mizpah.

and tell them, Thus says Yahweh of Armies, the God of Israel: Behold, I will send and take Nebuchadnezzar the king of Babylon, my servant, and will set his throne on these stones that I have hidden; and he shall spread his royal pavilion over them.