Catigern

Catigern appears in early medieval British narrative cycles placed in the post‑Roman, 5th‑century context of Vortigern, Vortimer and the arrival of Hengist and Horsa. In the Historia Brittonum (Nennius) he is named as a kinsman who fights alongside Vortimer against the Saxons and dies at the Battle of Epsford (Aylesford). Genealogical sources such as the Harleian pedigrees and Jesus College MS 20 insert him into regional dynastic lines (including Powys) with variant parentage—some traditions call him a son of Vortigern while others place him differently—reflecting reuse of the figure for lineage legitimation. Geoffrey of Monmouth and later literary sources dramatise and embellish these events (for example the mutual slaying with Horsa in Geoffrey's account).

Medieval chronicle and genealogical sources provide no detailed physical description. In later literary treatments (for example John Lesslie Hall's poem 'The Death of Horsa') Catigern is depicted as an armed combatant—shouting and bearing a shield—but primary medieval texts do not record specific physical features.

No supernatural powers are ascribed in the provided sources. Catigern's 'abilities' are social and martial: he is represented as a warrior-prince who fights in pitched battles against Saxon leaders (Hengist, Horsa) and whose death at Epsford/Aylesford forms part of the remembered resistance. His significance in sources is as a dynastic ancestor and military actor rather than as a magical or spiritual agent.