Based upon currently known Nolan Y-DNA test results (at the FamilyTreeDNA website) we know that most modern-day Nolan descendants, like most males with European origins, belong to the R1b subtree/haplogroup of the human family.

Armed with this fact, you may also want to explore what modern-day archaeogeneticists have discovered about the early wanderings of our distant Nolan ancestors prior to reaching Ireland.

• R Haplogroup Migrations (clickable Google Map)
  
• R1b Haplogroup and the Peopling of Europe (slides)
  
• International Society of Genetic Genealogy (ISOGG)