This name is referred to several bands:
These are photos from concerts where If played, so they may be of other bands that played the concert as well.
If / Lynyrd Skynyrd Oct 2 - 6, 1973 Atlanta, Georgia, United States Uploaded by Zimtrim
Frank Zappa / The Mothers Of Invention / If / Martin Mull May 9, 1973 Passaic, New Jersey, United States Uploaded by Zimtrim