Obituary: John ‘Jack’ Knysz, 71, of Irons. John “Jack” Knysz, 7,1 of Irons, passed away unexpectedly on Thursday June 17, 2021. Jack was born in Chicago, the eldest son of Peter and Marcella (Gronskis) Knysz. After graduating from Brother Rice prep school, Jack served two terms in the U.S. Army in Vietnam during the Vietnam Conflict. After returning home and…