'Royal' in the Bible

Who should not fear thee, O King of the nations? for to thee doth it appertain; forasmuch as among all the wise men of the nations, and in all their royal estate, there is none like unto thee.

Now it came to pass 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 unto Gedaliah the son of Ahikam to Mizpah; and there they did eat bread together in Mizpah.

and say unto them, Thus saith Jehovah of hosts, the God of Israel: Behold, I will send and take Nebuchadrezzar the king of Babylon, my servant, and will set his throne upon these stones that I have hid; and he shall spread his royal pavilion over them.