Here....this....
"In August of 1944, Jock McLaren, an Australian Army officer, conducted an appendectomy on himself without anaesthesia of any kind, using only a pocket knife and a mirror. He then proceeded to suture himself with what he had on hand - "jungle fibre". Though not qualified in human medicine or surgery, McLaren had considerable knowledge of veterinary medicine"
....He was named "Jock McClaren" after performing the surgery with a jack knife....before that he was Maury Cumstein.