Rudraige mac Sithrigi (Irish: Ruairí; English: Rory mac Sitric), was, according to medieval Irish legend and historical tradition, a High King of Ireland.
The son of Sitric, he took power after killing his predecessor, Crimthann Coscrach, and ruled for thirty or seventy years, after which he died of plague in Airgetglenn.
[3] The poem "Druim Cet céide na naomh"[4] states the convention of Druim Cet (held c.590 AD) was 700 years after the reign of Rudraige, which would imply a floruit of c.110 BC.
Rudraige was particularly associated with the northern part of Ireland: the Ulaid, who later formed a confederation in eastern Ulster in the early Middle Ages, traced their descent from him, and the Lebor Gabála Érenn names him as the grandfather of the Ulaid hero Conall Cernach.
John O'Hart lists the following issue in his Stem of the Irish Nation: It is claimed that some traditions of the Clanna Rudraige assign the Bay of Dundrum in modern County Down, as the resting place of Rudraige.