No. The fact is that we do not know who the first "Americans" were. There are a number of theories but no conclusive proof that can be traced back to any other culture. Some theories place the first immigrants coming from:
- Polynesia
- South East Asia
- Japan
- Siberia
- China
- Northern Europe
- North Africa
- Middle East
It is just as possible (although undoubtedly refuted by anthropologists and archaeologists) that human life could have begun in and abandoned the Western Hemisphere, only to return at a later time. Keep in mind that paleoanthropology and paleoarchaeology are largely scientific guesswork.