Jon Paul Klinkhammer, 55, of Rockton died at 9:18 a.m. Friday, January 11, 2013 in Rockford Memorial Hospital after a sudden illness. Born September 2, 1957 in Beloit, WI to Mr. and Mrs. Peter Albert and Lois Ann (Massen) Klinkhammer. He was a lifelong resident of the Rockton area. Served in the Army Reserves. Jon enjoyed spending time with his significant other of 31 years, Bonnie Klinkhhammer; and with his grandchildren. He also enjoyed music and wood working. He was a graduate of Hononegah High School.\r\r\n\r\r\nJon is survived by his significant other, Bonnie Klinkhammer of Rockton; son, Craig Pfaff of Rockton; daughters, Megan Klinkhammer of Beloit, Wisconsin, and Jessica Klinkhammer of South Beloit; son, Wolfegang Luethy of Milwaukee, Wisconsin; grandchildren, Lily Pfaff, Jacob Klinkhammer, Dominic Putnam, Donovan Niedfeldt, and Darren Niedfeldt; father, Peter Klinkhammer; brothers, Stephen Klinkhammer, and Dennis Klinkhammer; sister, Phyllis (Robert) Rygh; and several nieces and nephews. \r\r\n\r\r\n A memorial ceremony will be held at a later date for friends and family to attend. Cremation rites were accorded. Memorials may be given to the family.