No, but they are brothers.
No.
If this were true, which one would be Carl and which one Perkins?
No. Although both musicians, they barely played together.
We have a winner! Edgar (l) and Johnny (r) Winter.
Correct. They remained lifelong friends. Schmeling later became a very successful business man, owning a Coca-Cola bottling plant. He helped out Louis financially and paid for his funeral.