Terrance Wayne Thielman, 53, of Alton, IL passed away at 4:41 pm, Saturday, June 6, 2026 at his residence. He was born on March 16, 1973 in Superior, WI to the late Richard and Linda (Shaver) Thielman. He was a mechanic. He is survived by three daughters, Kimberly Thielman, Sabrina Thielman and Casondra Thielman; two grandchildren, BrayLynn and Bentley two brothers, Bruce, Thielman and Robert Bergson and a sister, Valerie Velasco. Besides his parents, he is preceded in death by a sister, Christine Thielman. A Celebration of Life will be held at a later date in Wisconsin.