Another excellent work on this subject is “Saxons, Vikings and Celts: The Genetic Roots of Britain and Ireland,” by Bryan Sykes, who also wrote the groundbreaking “Seven Daughters of Eve.” All fascinating.
Thanks La Lydia.
Saxons, Vikings, and Celts: The Genetic Roots of Britain and Ireland (Paperback)
I’ve read some of Sykes’ work but not that book...fascinating topic.