Anarion

The only son of Ancalime and Hallacar, who became his mother's Heir after she became Numenor's first Ruling Queen. His parents became estranged soon after his birth, and he seems to have been brought up in an oppressive atmosphere. He had three children of his own, with the first two being daughters. Either of these might have succeeded as Numenor's ruler, but both refused the Sceptre, apparently for fear of the formidable Queen Tar-Ancalime. So, after Anarion himself became King as Tar-Anarion, his son and third child, Surion, became his Heir.

Note that this Anarion is not to be confused with the rather more famous Anarion, the son of Elendil, who was one of the founders of Gondor. That Anarion was born in Numenor centuries later, and survived its Downfall.