Anárion:

The younger son of Elendil, Anárion was born in NÚmenor, and died in the year 3340 of the Second Age of the Sun, killed by a large stone in the siege of Barad-Dûr. As far as I can find, there is no record of his year of birth. It was probably destroyed by the passing of time, or in the downfall of Númenor. Before the War of the Last Alliance, Isildur and Anárion were both rulers of Gondor, under their father Elendil. Anárion's city was Minas Anor, the Tower of the Sun, later known as Minas Tirith, the Tower of Guard.