
Memorialized in partnership with Hutchens-Stygar Funeral & Cremation Center & Confluence Center
Read Mary's Obituary
Mary Eileen Diffenauer passed away peacefully at home on December 21, 2025, after a long and courageous battle with cancer. She was surrounded by her loving family. Born on September 8, 1949, in St. Louis, Missouri, to the late William and Dolores Keenoy. She married David Joseph Diffenauer on May...
Read the full obituary on our trusted partner sites below.
Other Ways to Support the Family
Missing or inaccurate information?
We want to honor your loved one’s memory with accuracy and care.
Contact customer supportMissing or inaccurate information?
We want to honor your loved one’s memory with accuracy and care.
Contact customer support