It’s amazing how we can now look into the past using DNA. Used to be researchers only had the study of languages and artifacts to determine origins and migrations.
The DNA studies can show where genes have survived, but don’t really help with geographic origins, not least because the sample size of ancient DNA is ridiculously small, but mostly because people move around, and do so surprisingly rapidly. The mass movement of population is more the rule than the exception, because travel in groups was considerably safer.