'Royal' in the Bible

and formed us into a kingdom [as His subjects], priests to His God and Father—to Him be the glory and the power and the majesty and the dominion forever and ever. Amen.

“You have made them to be a kingdom [of royal subjects] and priests to our God; and they will reign on the earth.”

And the dragon (Satan) stood on the sandy shore of the sea.Then I saw a [vicious] beast coming up out of the sea with ten horns and seven heads, and on his horns were ten royal crowns (diadems), and on his heads were blasphemous names.

The ten horns that you saw are ten kings who have not yet received a kingdom, but [together] they receive authority as kings for a single hour [for a common purpose] along with the beast.

For God has put it in their hearts to carry out His purpose by agreeing together to surrender their kingdom to the beast, until the [prophetic] words of God will be fulfilled.