Irish King in the fifth century, known as “Niall of the Nine Hostages”. Founder of the dynasty Uí Néill “descendants of Niall”.
Son of Eochaid Mugmedon (an Irish High King) and Cairenn (daughter of a British king). Reportedly had 12 sons, many of whom became powerful kings.
Y-DNA STR profile data derived from unique profile found at high frequencies in surnames that have been thought to have descended from the Uí Néill lineage and peaks in frequency in historical regions which were under Uí Néill power.