re: #369 Obdicut

And you’re likely to have repeats in that 1024, especially when you’re dealing with small, insular communities like Sephardic Jews and Icelanders.

Especially with those groups, the “collapse” of the ancestral tree will be noticeable. Any two ancestors 10 generations could easily be 100 years apart in their life-periods.

Iceland is quite an isolated community.

Sephardic Jews, like many Iberian populations, have a very complicated history. So many migrations in and out of that corner of Europe. Even if your ancestors strictly enforced marriage within the religion/cult, some Jews could have ended up in Iberia from early Roman times. Just about any empire has tried to land there or invaded for convenience (yes, even Vikings.) One reason the Basques are of interest to genetics studies is that they have tried to remain an isolated population and outside of the wide mixing that was happening on the peninsula.