Witness Mary seems to be a relative of the priest. Mary Egan mark, was O'Stenson ?? Perhaps it was his niece/sister. Shouldn't it have been written 'Ni Stenson ?
Also entry underneath priest has written Burke. Maria has signed Bourke.
Also Kerran, Ciaron, Kieron is reputedly a corruption of Ciarson, 'son of Kerry'. Ciar means 'Black haired or Dark one'. CiarraighTo establish Norse connections you may have to go back to when it was named, see who was in power then, and whether they were dark haired. So...legends...
The Dingle peninsula, also known as Corca Dhuibhne, is reputed to be where the Celtic Milesians (Sons of Mil, Spanish) arrived and where they fought and defeated the Tuatha Dé Danann to successfully establish the culture from which the Gaelic people of Ireland were descended. In fact, Mil’s Egyptian wife Scotia, whose descendants went on to give her name to Scotland, died fighting the Tuatha Dé Danann and she is reputedly buried along with her horse just outside Tralee.
I see no Vikings, but they could have arrived later, further north, I am so sorry if you wanted them.