The Irish annals purport to record events in the fifth century, but their reliability is doubtful as such early entries were added in the ninth century or later. The chronology of the annals is particularly suspect as it is believed that this was created retrospectively to match what were believed to be the dates of Saint Patrick with the kings named by Patrick's earliest hagiographers,
Muirchú moccu Mactheni and
Tirechán. Both writers had Patrick come to Ireland in Lóegaire's reign and meet with him. Since the annals provided two death dates for Patrick, 461 and 493, Lóegaire's reign was made to fit these, and in general the earlier date. For the later date, Lóegaire's son
Lugaid appears to have served the same adversary role. In late prehistoric times, beginning in the fifth century, the ancestors of the
Uí Néill—descendants of Niall of the Nine Hostages—expanded into the east midlands of Ireland, southern
Ulster and northern
Leinster, at the expense of the previous overlords. The record of the Irish annals, perhaps unreliable at such an early date, records war between the descendants of Niall and the Leinstermen. Although later associated with the conquests in the east midlands, Tirechán's life of Patrick may suggest that Lóegaire's power was centred in
Connacht. Patrick is said to have met Lóegaire's daughters near
Cruachan, a complex of prehistoric sites associated with the kingship of Connacht in legend and in history. According to king lists, the earliest of which is dated on internal evidence to the reign of
Fínsnechta Fledach (died 697), Niall was succeeded by Lóegaire, who was in turn followed by a second son of Niall,
Coirpre, Coirpre by
Ailill Molt, one of the few kings not descended from Niall, and Ailill by Lóegaire's son Lugaid. Later lists make
Nath Í king between Niall and Lóegaire and also omit Coirpre. Given the many problems with the record, the dating of Lóegaire's floruit is imprecise, estimates placing it in the second half of the fifth century, to perhaps the late 480s. ==Saint Patrick==