Koonce, May H. (nee: Gwaltney) of Dixon, MO, died on Thursday June 7, 2018, at the age of 75. Loving wife of Charles Koonce, Jr.; devoted mother of Jeff Koonce of Dixon, MO, Cindy (Brian) Kautz of Troy, MO, Charlene Koonce-Mashburn of Woodlawn Park, CO, and Andrew (Julie) Koonce of Edwardsville, MO; cherished grandmother of Brittany (James) Barry, Tucker Mashburn, Alaina Mashburn, Hadleigh Mashburn, McKinely Koonce, and Brooklyn Koonce.