"The highest levels of IBD sharing are found in the Albanian-speaking individuals (from Albania and Kosovo), an increase in common ancestry deriving from the last 1,500 years.
This suggests that a reasonable proportion of the ancestors of modern-day Albanian speakers (at least those represented in POPRES) are drawn from a
relatively small, cohesive population that has persisted for at least the last 1,500 years.
These individuals share similar but slightly higher numbers of common ancestors with nearby populations than do individuals in other parts of Europe (see Figure S3), implying that these Albanian speakers
have not been a particularly isolated population so much as a small one. "
Link:
https://journals.plos.org/plosbiolog...l.pbio.1001555