Kind(eren):
Brion was a half-brother of the famous Niall of the Nine Hostages.[Ancestral Roots]
Ancestral Roots, citing Carney ('Studies in Irish Literature andHistory') for the fifth century, puts Niall's death at about 542 AD, andthe death of St. Patrick about 490 AD. Many Irish pedigrees have Niall'sfather (Eochaid) d. 357, and Niall, b. c311, d. c378. This makes adifference of about 164 years?