(I) Germanic:
Late in the ancient Roman Empire, the Germans had formed several major branches, such as the East Goths, West Goths, Franks, Burgundians, Vandals, Angles, Saxons, Normans, etc. (of course, there are still some small branches)
(II) Slavic:
The Slavs were subdivided into the following three major branches:
A West Slavs - with Poles, Czechs, and Slovaks.
B South Slavs - there are the Bulgarians (a fusion of the Bulgarians of Turkic origin with the Slavs), Serbs, Montenegrins, Macedonians, Croats, Slovaks, and Bosnia-Herzegovinians.
C Eastern Slavs - divided into Russians, Ukrainians, Belarusians.
(C) Celts (i.e. Gauls):
A The more pure Celts - the Scots and the Irish. They have actually blended in a fairly Germanic component as well.
B The French, the Walloons (French-speaking) of Belgium, and the Luxembourgers have a fair share of Celtic blood.
Some other important peoples:
1 The Jews: from the Middle Ages onwards, there has been a succession of conversions to Christianity.
2 Hungarians: also known as Magyars,, with the Magyar nomadic tribes (near Turkic lineage) who came from North Central Asia to settle in the Danube plain in the 9th century AD as the main body, fused with some Germans, Slavs, and the descendants of the Huns, who had already lived here earlier, to form the Hungarians.
3 Finnish: originally Magyar close relatives, but absorbed too much Germanic Normans, has been seriously Germanized, from the appearance of the Germanic people can not be seen with the difference.
4 Romania: Dacians and ancient Romans the result of long-term integration. Orthodox Christianity.
5 Greeks.
6 The three Baltic states: Lithuania, Estonia, Latvia, where Lithuanians believe in Catholicism, while Estonians and Latvians are mainly Protestant Lutherans.
7 Bosnia and Herzegovina, who follow Islam.
8 Albanians who mostly follow Islam.
9 The Tskans (i.e. Gypsies).