Of Williamsville, New York entered into rest on June 15, 2025, age 89. Beloved wife of Anthony Grimmelt and the late James Koeppel. Loving mother of James (Susan) Koeppel, Eileen Koeppel, late Thomas Koeppel and Michael (Linda) Koeppel. Step mother of Anthony Grimmelt and Karen Frost. Dear grandmother of Jennifer (David) Keenan, Mathew, late Daniel (Laura) Koeppel, David, Stephen (fiancee Erin Knecht), Thomas Drabinski, Stephanie, Kristina, late Nicholas, Aaron and Evan Koeppel. Step grandmother of Ryan and Kaylin Frost and Wyatt and Sam Grimmelt. Great Grandmother of Danny, Lily, Chase, Dailyn, Mason, Liam, Weston and Bryson. Also survived by many nieces and nephews. Family and friends may call on Thursday June 19, 2025 from 4-7pm at PERNA, DENGLER, ROBERTS FUNERAL HOME, 1671 Maple Rd. Williamsville, NY 14221. A Mass of Christian Burial will be celebrated on Friday June 20, 2025 at 9:30am at Christ the King Parish, 30 Lamarck Dr. at Main St., Amherst, NY 14226. Please assemble at church. In lieu of flowers memorials may be made to Hospice Buffalo in Marianne's memory.