Elidir the Wealthy was killed in Arfon, according to the Chirk Codex, and a failed attempt to avenge his death was made by Rhydderch Hael, Mordaf Hael, Nudd Hael and Clydno Eidyn. Their pedigrees are shown below.
Clinog and Clydno have been identified as the same person. The former name is said to be a corruption of the latter. Also, the two names share the same cognomen, which means Edinburgh. However, their pedigrees indicate they were not the same individual as the following table, which uses the manuscript form of their names, illustrates. Clinog was three generations earlier than Clydno.
(Three other sons of Cynwyd Cynwydion who are mentioned in BGG 3 have not been included in the above table .)
In ByS 15 Clydno appears as the father of Euronwy, the wife of Gwaith Hengaer and the mother of St. Gwrwst. In Culhwch ac Olwen his daughter is mentioned in a list of “the gentle, golden-torqued ladies of this Island” as “Eurneid daughter of Clydno Eidin”.The medieval poem Y Gododdin by Aneirin celebrates the valour of his son, Cynon, in the battle of Catraeth which occurred c. 600. Bartrum maintained CO’s claim of Eurneid being one of the ladies at Arthur’s Court is an anachronism. However, it is likely she was a daughter of Clinog, and not Clydno.