in re: epirus, the ancestors of the anglo-saxons (e.g. thor of thrace) were the legendary progenitors of the hellenes, having gone south during the last ice age.  when it warmed up, they went back to lower saxony and nordic regions, whence they proceeded to england.  but it was long ago and nobody remembers any more.  AFAIK the only ones who weren't conquered nor absorbed by them were the native picts.