I recently had my DNA tested with 23andme and my mtDNA haplogroup was revealed to be U5a1b which was a big unexpected surprise to me. I have tracked my maternal ancestry as back as the second half of the 19th century to Pieria, Greece, where my maternal grandmother's maternal grandmother came from. According to my grandmother she belonged to the Sarakatsani group of Greeks. As far as I'm concerned U5 is pretty rare in Greece and not particularly common in the Balkans either. Could my great-great-grandmother be a direct descendant of the paleolithic population of the Balkans? Or could her maternal ancestors have moved to Greece from elsewhere? Are there more clues about U5a1 and U5a1b in particular than the fact that
"Haplogroup U5a1 originated in Europe during the Ice Age, about 20,000 years ago. At the time people were confined to small refuges in the southern part of the continent. When the glaciers began receding about 15,000 years ago people began migrating northward, carrying U5a1 and other haplogroups with them. Today U5a1 is most commonly found in places such as Norway and northern Germany.Other members of the U5a1 haplogroup moved south into the Near East, perhaps in search of a warmer, more hospitable climate than the dry, glaciated tundra of Ice Age Europe. Today their maternal descendants can be found at low levels (less than 2%) in Turkey, Iran, and Syria." (23andme)
According to some sources the Sarakatsani is are one of the most ancient populations of the Balkans. Is there any evidence of the predominant haplogroups among them?