Lord Cerridwyn Cadarn was an elder of Clan Cadarn in the Fourth Age, and an active participant on the rebel elves' side in the Elven Civil War. Cerridwyn authored The Great Divide as well as its sequel, which later became included as the Cadarn chapter of The Voice of the Elders, which chronicles the equally named period of elven history, from the time just after the fall of Prifddinas to Clan Iorwerth, to the reversion of the city to crystal seed form and the end of King Baxtorian's reign. Cerridwyn's concluding prayer in these writings was for the reunion of the elven people of all clans and the regrowth of Prifddinas, which he did not live to see; his prayer was answered, centuries later, with the leadership of his successor, Arianwyn, in collaboration with an adventurer and many others