Claim: Dunchad mac Conaing was a co-ruler until Talorcan killed him, and is presumed to be the same person as Ronan.
Evidence: The death of Dúnchad mac Conaing in battle is reported in the Annals of Tigernach in 654: "... there fell Dúnchad, son of Conaing, and Congal, son of Ronan".