Telemnar's Kingship was one of Gondor's shortest and most tragic. He succeeded to the throne after his father Minardil was brutally slain in a sudden Corsair attack on Pelargir, but he was not to reign for long. After just two years on the throne, the Great Plague came out of the east and ravaged Gondor. Telemnar and all his children died of the sickness; he was succeeded by his nephew, Tarondor.
The date of Telemnar's birth appears only in The History of Middle-earth volume XII, The Peoples of Middle-earth. It cannot therefore be considered completely reliable.
The name Telemnar also appears in Tar-Telemnar, the Elvish translation of AdûnaicAr-Gimilzór. That Adûnaic name contains gimil, 'star'. The Elvish translation Telemnar does not appear to be literal, but instead is probably related to telmë, the dome of heaven, hence the translation 'fire of heaven'.