William Joseph Koeller, 78, of Fort Wayne died May 26, 2020 at Parkview Regional Hospital, Fort Wayne, IN. William was born to the late Frank and Beatrice Koeller on September 4, 1941 in Youngstown, OH. He was a member of Saint Charles Borromeo Catholic Church. William also served proudly in the United States Navy and was the Maintenance Supervisor at GM Powertrain for 41years. William is survived by his wife Elizabeth "Betty" Koeller; daughters Loy Marie Koeller, Cheryl Lynn (Jamie) Koeller-Hopton, Erica (Brad) Renee Windsor and Keri Ann (Will Swary) Koeller; step-sons Nicholas Andrist and Jourdan David (Stacey) Andrist; siblings, Debbie Koeller-Dolak and Chris (Jan) Koeller. Nieces and Nephews; Mathew Matchett, Elizabeth (Richard) Vaughn, Evelyn Vaughn, Aurora Vaughn and David Dolak; Grandchildren Heidi Hopton-Gorman, Nicholas James Koeller-Hopton, Cooper Willis Hopton, Eleanor Marie Windsor, Henry William Windsor, Emily Anne Swary, Abigal Andrist, Jillian Andrist and Lucille Andrist. William was preceded in death by his sister Beverly (George) Matchett and nephew Mathew Matchett. Mass of Christian Burial will be 10:30 am, Tuesday, June 2, 2020 at Saint Charles Borromeo Catholic Church, 4916 Trier Rd with calling one hour prior. Visitation will be held Monday, June 1, 2020, 4:00 pm - 7:00 pm at Divine Mercy Funeral Home, 3500 Lake Ave., Fort Wayne. Face coverings are required. Burial will be at a later date.