of Numenor > Ar-Adunakhor > Ar-Zimrathon > Ar-Sakalthor
Ar-Zimrathon was the twentieth King of Numenor and
the son of Ar-Adunakhor, who was the first to change his name to the
language of Numenor and
to persecute the Faithful.
Ar-Zimrathon didn't do anything too important in his
reign and passed
the scepter to his son, Ar-Sakalthor.
Reference: The Return of the King