Ceidwad was an elven mystic from Tarddiad who wrote the Cerddi soon after Seren arrived to their world. She died at some point before the elves travelled to Gielinor, which upset Seren greatly, causing her to try and extend the elves' lifespan. Angof is descended from her. She is also mentioned in the Dusty Tarddian Journal but her name is spelled as Ceidwadd.