William "Bill" J. Tresnak Jr, 80, of Bartlett, died Friday, April 21, 2023. Born June 3, 1942 in Chicago. Bill was a veteran of the U.S. Army having served during Vietnam. He was known for his sense of humor. Beloved husband of Carol (nee Beuse), caring dad of Barbie; kind grandpa of Darina and Adrienne and dear son of the late William Sr and Margaret Tresnak. Memorial visitation 3:00 pm until time of memorial service 5:00 pm Sunday, May 7, 2023 at the Countryside Funeral Home and Crematory, 950 South Bartlett Rd, Bartlett. 630-289-7575