Tar-Anarion was a dunadan and the eighth King of
Numenor.  He
was the son of Tar-Ancalime,
the first ruling Queen of Numenor. 
    His two eldest children were daughters, but they
both refused the
scepter.  So the kingship passed to his third child and eldest
son, Tar-Surion.
Reference: The Return of the King