
Yes. I read the books and all the appendices. PJ has led to this question to be asked since he thought moviegoers were too simpleminded to grasp the fact that there were two Numenorean kingdoms in exile. not one.
They did after an usurpation from Isildur’s nephew Meneldil. It was believed that Isildur had relinquished his rule there. All of this is mentioned in the attempt by Arvedui to take the throne. Even the Stewards were hard hearted in this. Denethor made it clear that he was a Steward of the House of Anárion (The Pyre of Denethor). The kings of Gondor all traced their line through the male descendants of Meneldil.