Haplogroup I1

My brother's Y-DNA test revealed that his predicted Haplogroup is I1 (shorthand I-M253).  According to this site, the I1 subclade of Haplogroup I is estimated to be 4000 to 5000 years old (the old "15,00-20,000years ago in Iberia" information was wrong), and confirmed by the single nucleotide polymorphism, SNP, known as M253. While many I1 members trace their ancestry to Scandinavia, others find their roots in the British Isles, Germany, and beyond.

In Britain, haplogroup I1-M253 et al is often used as a marker for "invaders," Viking or Anglo-Saxon.