'Royal' in the Bible

And when Athaliah the mother of Ahaziah saw that her son was dead, she rose up and destroyed all the royal seed.

And it came to pass in the seventh month, that Ishmael the son of Nethaniah, the son of Elishama, of the royal seed, came, and ten men with him, and smote Gedaliah, that he died, and the Jews and the Chaldeans that were with him at Mizpah.