Ceidio's brother, Eliffer Gosgorddfawr was presumed to have been a king of Ebrauc, believed to be the old Roman stronghold of Eburacum.
The brother of Ceidio, Eliffer Gosgorddfawr is believed to have been a king of Ebrauc, which is thought to be the remains of the old Roman fort of Eburacum.