
Originally Posted by
Maciamo
A little update based on new information.
All haplogroups I are the indigenous people of Europe, the direct descendants of Cro-Magnon (it isn't R1b as previously thought). This is why I is found everywhere in Europe at low frequencies, except I1 which remained strong in Germanic countries. A pocket of I2a2 survived around Croatia because of it's relative isolation, outside the Danubian corridor used by new waves of immigrants/invaders. I2a1 survived at high frequency in Sardinia simply because it is the most isolated place in Europe.
Ancient Greeks
Pelasgians (pre-Minoan Greeks, or Helladic Greeks) belonged to an admixture of I, E-V13, T and G2a. E-V13 and T probably arrived in Greece from the Levant (and ultimately from Egypt, hence the small percentage of T) in the early Neolithic, 8,500 years ago. G2a came from the Caucasus approximately 6,000 years ago as herders of sheep and goats (and early miners ?).
Minoan Greeks migrated from Mesopotamia via Anatolia. They were mostly J2 people, but probably had some E too.
Mycenaean Greeks arrived around 3,600 years ago from the Ukrainian steppes. They were an Indo-European people belonging to R1a. So were the Macedonians and the Thracians (hence the higher density of R1a in northern Greece).
Greece was invaded by the Dorians around 1200 BCE. Nobody knows who they were or where they came from, but the high percentage of R1b in the regions where they settled (Peloponese, Crete) strongly suggest that they were R1b people. The events are linked to the Sea Peoples (see below), who were probably R1b people from the north-east of the Black Sea, or early Celts from central Europe.
Greek historians sometimes mention that the Dorians were the descendants of the Trojans who came back to avenge their ancestors. The Trojans were an Indo-European people related to the R1b Hittites (see below). This would also explain why there is about the same percentage of R1b and R1a in modern Greece. Each correspond to a different wave of Indo-European invader. They only make up 12% of the population (each) because the Neolithic farmers (especially E and J2) were already well-established and numerous by that time.
Ancient Anatolians
Southern Anatolia was colonised early by Neolithic farmers from the Near East (E + J2).
The Indo-European invasions brought the Hittites (1750 BCE), the Lydians and Lycians (1450 BCE) and the Proto-Armenians (1200 BCE). All were probably R1b, considering the high percentage of R1b in the regions they settled. R1b Indo-Europeans are thought to have originated on the north-eastern shores of the Black Sea, just north of the Caucasus. They could have invaded northern Anatolia by crossing the Caucasus, sailing across the sea, or going around via the steppes through the Bosphorus.
Later R1b were possibly (part of) the Sea Peoples that ravaged the ancient Near Eastern civilizations, from Greece to Egypt. Their advance military technology and sea-based culture make of them very good candidates.
The Phrygians arrived in northern Anatolia after 1200 BCE, and were probably an offshoot from the Thracians (so R1a).
The Cimmerians are probably the last wave of migration (around 700 BCE) from the R1b homeland. They are said to have be expelled from Anatolia and moved to Europe, where they joined the other R1b people. Germanic and Celtic people both claim (partial) Cimmerian ancestry.
Romans, Celts and Germans
Celtic, Italic and Germanic people are all descended from the same R1b1b2 stock. They split north of the Alps.
The Italic branch went south and mixed with the Terramare people who were I2a, G2a and E-V13. Northern Italians have more Indo-European Celto-Italic blood, while southern Italian have more indigenous blood (the highest being Sardinia, then Basilicata).
The Germanic branch moved north and mixed with the indigenous I1 and I2b people, who had already mixed with R1a migrants from the Corded Ware (Battle Axe) culture. The new hybrid Germanic people retained the highest percentage of aboriginal haplogroup I.
Celtic people split in several groups : the Brythonic went to Britain and Ireland, the Gaulish to France, the Iberian to Spain and Portugal, and the Alpine remained around Austria, Switzerland, southern Germany, Eastern France and Belgium. The Iberian and Gaulish groups mixed with I2b, I2a and E people, the Alpine with I2b and E, and the Brythonic just with I2b people.
It is likely that the language of the aboriginal Europeans influenced the various Celtic, Italic and Germanic dialects. Germanic languages diverted the most from the original European R1b language because it assimilated a very large part of aborigines.
From about 700 BCE, the Etruscans settled around Tuscany and the Greeks in southern Italy. Etruscans probably came from Palestine and brought haplogroups J1, J2 and E with them. The Greeks in Italy were Doric and brought J2, E, G2a and probably more R1b (see above). The Romans progressively absorbed the Etruscans and Italian Greeks and mixed with them. By the time of Julius Caesar Roman citizens were probably composed of 45% of R1b, 20% of J, 15% of E, 15% of G2a and 5% of I2a.