First of all, thank you for your answer!
On GEDmatch I have an individual who is related to me. I see his real name and his surname is the same as my mothers maiden name. Even if I selected 30cM, he still appears.
He has mtDNA X2e1 and YDNA R1a1a.
The next one has mtDNA H47 YDNA I1-Z60...