Jack K. Rentner passed away peacefully at home on Feb. 11, 2025. He
was 93. He was co-owner of Rentner Marine Service in Chicago with his
brother, Paul Rentner. Jack was an avid boater, tinkerer and fixer of many
things, truly a “Jack of all trades.” He was preceded in death by his wife,
Doris, (nee Walhgren), his father, Paul E. Rentner, his mother Helen, (nee
Danielsen), and his brother, Paul E. Rentner, Jr. Jack is survived by his
children, Verne Rentner (Diane), Valerie Rentner, Janice Ratz (the late Bob),
and Julie Buss (the late Richard), 7 grandchildren, and many great
grandchildren. Jack was loved by so many friends and the boating
community. A celebration of Jack’s life will be held at a later date. We
respectfully request no flowers or monetary gifts. If you’d like, make a
donation in Jack’s name to your favorite charity. As Jack sails into heaven,
we’d like you to smile when you remember his wonderful sense of humor.