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Obituary
John "Jack" Martin Gentner, born on October 5, 1954, in Detroit, Michigan, passed away peacefully on April 29, 2025, in Trenton, Michigan, at the age of 70. Jack was a devoted husband, father, grandfather, brother, uncle, and friend who will be deeply missed by all who knew him.
Jack spent his career as a skilled crane operator for McLouth Steel and also worked as a truck driver. His work ethic and dedication were admired by his colleagues and friends alike.
A true outdoorsman at heart, Jack loved everything about nature. He found joy in hunting, fishing, boating, snowmobiling, and cherished the time he spent at his beloved home away from home at Houghton Lake. Jack was also an avid sports fan, cheering passionately for the University of Michigan teams, as well as the Detroit Tigers, Lions, and Red Wings.
Jack is preceded in death by his parents, Marvin and Geraldine Gentner; his in-laws, Chuck and Beverly Harbaum; his brother, Tom Gentner; his son-in-law, Sean O'Hehir; and his brother-in-law, Vito Weeda.
He is survived by his beloved wife of 32 years, Mary; his children, Jody (John) Petroff, Janis (Roger) Hollenbeck, Lindsey O'Hehir, and J.C. (Jade) Gentner; and his six cherished grandchildren, Ashley, Bryce, Dylan, John, Rosie, and Henry. Jack also leaves behind his sister, Joann Weeda; brothers-in-law, Chuckie (Rebecca Barlett) Harbaum and Ernie Harbaum; sister-in-law, Judy Gentner; and many nieces, nephews, cousins, family, and friends who will remember him fondly.
A service to honor Jack's life will be held on Friday, May 9, 2025, at 1:00 PM at Michigan Memorial Park, where he will also be laid to rest.
If you would like to donate to John's family, please click on the button on the left.
Jack's memory will live on in the hearts of those who loved him, and his legacy of kindness, love for the outdoors, and devotion to family will never be forgotten.
