There are at least six bands called Mongrel: a punk band from the U.S., a hip-hop/indie rock band from the UK, a german punk/hardcore band from Munich, a hardcore punk band from Galway, a black metal band from Brooklyn, New York, a Canadian one man project who recorded the self titled album "Mongrel" which can be classified as stoner rock and lastly a Death Metal/Hardcore called Mongrel from San Diego, California.
These are photos from concerts where Mongrel played, so they may be of other bands that played the concert as well.
Wolvhammer / Mortals / Mongrel Nov 5, 2014 New York, New York, United States Uploaded by Shayne Mathis