His father's reign was brief but his own reign was even briefer. He was (together with Isildur) the shortest reigning King of Gondor.
In TA 1636 the Great Plague raged through Middle-earth and Gondor was one of the most seriously affected areas in Middle-earth. Many Númenóreans died, amongst them King Telemnar and his immediate family. He was succeeded by his nephew Tarondor (the son of Telemnar's younger brother Minastan).
|Kings of Gondor|
Elendil | Isildur | Meneldil | Cemendur | Eärendil | Anardil | Ostoher | Rómendacil I | Turambar | Atanatar I | Siriondil | Tarannon Falastur | Eärnil I | Ciryandil | Hyarmendacil I | Atanatar II Alcarin | Narmacil I | Calmacil | Rómendacil II | Valacar | Eldacar | Castamir the Usurper | Eldacar (restored) | Aldamir | Hyarmendacil II | Minardil | Telemnar | Tarondor | Telumehtar Umbardacil | Narmacil II | Calimehtar | Ondoher | Eärnil II | Eärnur | Aragorn II Elessar | Eldarion