The source of "The Who" in Barney's mind is known. It came from some compere
who used to introduce The Detours by making fun of their little-known
status. "Up tonight we've got all the way from Shepherd's Bush The Detours!
The who? The who?" So Barney suggested calling them The Who.
-Brian in Atlanta
The Who This Month!
http://members.home.net/cadyb/who.htm