Conn Cétchathach (Conn of the Hundred Battles)

Medieval sources present Conn as a prominent early High King of Ireland and the eponymous ancestor of the Connachta; genealogical traditions in later compilations also link him into the ancestry of the Uí Néill through subsequent genealogical constructions. Different medieval texts vary on specific predecessors and reign lengths (e.g., Lebor Gabála and later king-lists give differing durations such as twenty to fifty years), and versions disagree on details of his conflicts with rivals such as Mug Nuadat; these variant accounts reflect the multiplicity of medieval traditions that deploy Conn both as a dynastic exemplar and as a figure in pseudo-historical king-lists.

The primary sources do not supply a consistent physical portrait of Conn; narratives focus on deeds and ceremonial signs rather than physiognomy. In the visionary tale Baile in Scáil he treads the Lia Fáil at Tara, is enveloped in a mist and led to a plain with a golden tree, sees a silver vat bound with gold hoops full of red ale, a golden cup and serving spoon, enormous ox and boar ribs served at an otherworld feast, and meets a phantom described as a 'tall beautiful man' who identifies himself as Lugh. These items and scenes (Lia Fáil, golden tree, vat of ale, golden cup and spoon, ox and boar ribs, phantom Lugh) are part of the vision imagery associated with Conn rather than consistent physical descriptions of the king himself.

Sources depict Conn primarily as a warrior-king and political leader: he fights numerous battles (his byname 'of the Hundred Battles' signals extensive martial activity), wages protracted war with Mug Nuadat including a decisive night attack at Mag Leana, divides and later reunifies rule (Leth Cuinn versus Leth Moga), negotiates treaties, reinstates exiled kings, and exerts overlordship across provinces. He also appears in visionary and otherworld contexts—Baile in Scáil presents a prophetic vision in which the sovereignty of Ireland and the figure Lugh reveal years of his reign and names of successors—and functions as patron and protector in sagas that place younger heroes (notably the youth Fionn mac Cumhaill) at his court. His family narratives include otherworld motifs, such as his son Connla leaving with a fairy woman to Mag Mell. The sources emphasize royal sacrality, prophetic legitimization, and martial leadership rather than overt magical powers performed by Conn himself.