Walter Paul Mattern (7 January 1913 — 7 October 1974) was a Hauptsturmführer (Captain), in the Waffen-SS during World War II who was awarded the Knight's Cross of the Iron Cross, which was awarded to recognize extreme battlefield bravery or successful military leadership by Nazi Germany during World War II. Mattern was awarded the Knight's Cross on the 20 October 1944, while he was the commander of the 7th Company, 3rd SS Panzer Regiment, 3rd SS Panzer Division Totenkopf