Telemnar was born in the middle age of Tolkien in 1516 of the third age. Telemnar became the twenty-sixth king of Gondor in 1634. Telemnar planned to conquer Umbar. But in 1636 Gondor started a plague epidemic. Many of the people of Gondor died because of the plague. King Telemnar died too because of the plague.
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From @manyasli