Visitors from Proxima-Centauri

Okay, many thanks for that. But now another question: The next sun system seen from us belongs to the Centauri group. To my knowledge is the first Proxima-Centauri, then Alpha-Centauri and Beta-Centauri, which by us though, is being called something else, namely the BARNARD star or similar, which is at a distance of a little bit more than 6 light years away from us. Now, are you informed about whether any humans live in those sun systems who come to Earth