The origins and background of the Clanna Rudraige comes from medieval texts, most of which combined myth, pseudo-history and possible real events into an elaborate and largely fabricated legendary history. According to one of these works, the
Annals of the Four Masters, the Clanna Rudraige are descended from
Rudraige mac Sithrigi, a prince of the province of Ulaid who became
High King of Ireland sometime between the 1st and 3rd centuries BC. During the reign of
Eochu Feidlech as High King, the provinces of Ireland are said to have been turned into kingdoms, with the ruler of each tribe who possessed a province becoming a king, as such the first
king of Ulster was
Fergus mac Léti, grandson of Rudraige mac Sithrigi. Fergus' cousin
Conchobar mac Nessa was king of Ulaid during the
Ulster Cycle of
Irish mythology. According to these medieval texts, in the fourth century the
Three Collas invaded Ulaid. The Three Collas and their armies fought seven battles in a week against the Ulaid at
Achaidh Leithdeircc, killing
Fergus Foga, king of Ulster, in the seventh battle. The Collas burnt
Emain Macha, the capital of Ulaid, after which it was abandoned, and seized substantial territories in mid-Ulster. This is thought to be the origin of the medieval over-kingdom of
Airgíalla. ==References==