Just finished reading Leif the Lucky to my 2 year old, who sat with very un-bedtime like, rapt attention through the whole thing. This reminded me of a recent article in Molecular Biology and Evolution regarding the covariance of Scandinavian-derived surnames and Y-chromosomal signatures in northwestern England. Lest I begin to sound like a broken record, here we have yet another example of how classic marker studies are being validated by modern molecular methods.
Bowden, G et al., 2010, Excavating Past Population Structures by Surname-Based Sampling: The Genetic Legacy of the Vikings in Northwest England. Molecular Biology and Evolution 25 (2): pp. 301-309.