Did they evolve from apes at that spot, you think? 
Did they evolve from apes at that spot, you think?
Unlikely.
The "origin" of a racial, ethnic, national or religious group is normally considered to be that where they became distinguishable from ancestral groups.
For instance, Americans obviously all came from elsewhere. But none of their ancestors were Americans before their arrival and melding into a unique group.
Similarly, linguistic analysis shows that the Polynesians are primarily descended from a rather small group that spread out across the Pacific from Taiwan. Obviously, they weren't even really "native" to Taiwan, as their ancestors had come there from elsewhere. But at some point they developed a group of characteristics that was recognizably what we today call Polynesian.
My post was meant to point out that the Celts first became recognizable as Celts in Central Europe, probably somewhere around Bohemia. They migrated elsewhere, partly pulled by the desire to conquer others, and partly pushed by other groups coming into the areas they were leaving.
Which is pretty much the same history as every other group of humans.