John "Jack" Guelker III

John “Jack” Henry Guelker III, of Saint Peters, MO, passed away Monday, June 9, 2025, at the age of 89. Loving husband of the late Mary C. Guelker and father of the late Patricia M. Jones; cherished grandfather of Michael G. Jones; dear brother of Carole (the late Lou) Pessoni; and he is also survived by a host of in-laws, nieces, nephews, and cousins.

Jack proudly served his country in the United States Navy. He found joy in life’s simple pleasures—spending time in the garden, working on puzzles, fishing, and building things with his hands. Jack was dearly loved and will be greatly missed by all who knew him.