Sorry, that was Rome, not Vikings.
But even so, Aglin has what 52% English?Irish blood, but 2% Scandinavian,
"When the Vikings arrived in Ireland they were the first influx of new people to the island since the Celts arrival during the Iron Age Period. For over 8 centuries Ireland was left untouched from external attacks unlike neighbouring Britain who faced conquests from the Romans and Germanic people.
The first Vikings to arrive in Ireland were from Scandinavia who were out to discover new lands and create settlements. They had also settled in Scotland and, like Ireland, they began to settle within the local population. In Scotland these people became known as The Gallowglasses who would later arrive Ireland as hired mercenaries."
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History Of Vikings Invading Ireland