John B. Klaus III age 57 died March 28th, 2021. Beloved son to John (Jack) B. Klaus Jr. and Mary Diane Klaus nee Heffernan. Beloved brother to Kathleen Klaus (the late David Miller), Ann (John) Feldkamp, Margaret (Daniel) McKenna, and Amy (Dave) Palmeri. Loving uncle to Katy (Cody) Rank, Janie Feldkamp, Erin Feldkamp, Robert Feldkamp, Grace Feldkamp, Greta Klaus, Louie Klaus, Olivia Feldkamp, Joseph McKenna, Matthew McKenna, Molly Palmeri, and Ryan Palmeri. Fond nephew to many aunts and uncles. Cousin “Johnny” to all. John worked for the Library of the United States Court of Appeals for the Seventh Circuit library for over twenty-five years. John loved to read, ride his bike, travel, run marathons, be with his family and friends and watch the White Sox. He was generous to a fault. Viewing at G.L. Hills Funeral Home in Des Plaines from 9 am-10:30 am on Tuesday, April 6, 2021. Funeral service live-streamed at the Beacon Tap patio in Des Plaines starting at 11:00am, or view the funeral mass using Zoom link posted here. Please celebrate John here on his virtual memorial page and in lieu of flowers, John would want you to make a donation to Lakeview Food Pantry.