Dates: Born c. I.525, and passed over the Sea 29 September III.3021... which means that he spent approximately 6520 years in Middle-earth.
Race: Elves (Half-elven) Born to Eärendil and Elwing, both of mixed elven and human descent, Elrond and his brother Elros were allowed to choose whether they would belong to the race of elves or of humans. Elrond chose elvenkind, while Elros chose the fate of men.
Titles: Half-elven, Peredhil, Lord of Rivendell
Name: Two meanings are given for his name. There is a story related in one of Tolkien's letters that after Elrond and his brother Elros were taken captive as children they were released and were discovered playing near a waterfall. Elrond was found in the cave behind the waterfall and so was given his name which means 'Elf of the cave'. 'Elrond' is also translated as 'Stardome' or 'Vault of Heaven'.
Appearance: Descriptions in FotR indicate that he has dark hair and grey eyes. He is described as 'ageless', 'fair in face' and 'strong as a warrior'. Elrond is the grandson of Lúthien Tinúviel, celebrated as the fairest elf in the history of Middle-earth. His daughter Arwen was said by some to be the living image of Lúthien, and was also thought to resemble Elrond though 'in form of womanhood'... which adds up to one beautiful elf!
Married: Celebrían, daughter of Galadriel and Celeborn, III.109
Children: Elladan and Elrohir born III.130, Arwen born III.241
Dwelling place: Born at the Havens of Sirion, lived in Lindon early in the Second Age. Founded Rivendell in II.1697, and dwelt there until the end of the Third Age.
Skills: He is a 'master of wisdom', with gifts of healing and foresight, learned in the lore of Middle-earth. In the Second Age he also demonstrated his skills as a warrior and commander in battle.
Other key facts: Elrond holds one of the Three Rings - Vilya, the Ring of Air, which was given to him by Gil-galad. He served as Gil-galad's herald in the Last Alliance which defeated Sauron at the end of the Second Age. He was a member of the White Council, and summoned the Council of Elrond which decided the fate of the Ring in the Third Age.