1933 - 2020
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GEIGER, Brother Donald Raymond S.M.

Brother Donald Raymond Geiger, SM, died on December 29, 2020, in Dayton, Ohio, at the age of 87 with 68 years of

religious profession in the Society of Mary.

Brother Donald was born in Dayton, Ohio, on February 27, 1933, in Dayton, Ohio, to the late Raymond and Hedwig (Weghorst) Geiger. Bro. Don professed First Vows in 1952 and Perpetual Vows on August 15, 1956.

Bro. Don earned a BS in Biology from the University of Dayton, an MS in Botany and a Ph.D in Plant Physiology from The Ohio State University.

Bro. Geiger ministered as a teacher at Cathedral Latin High School in Cleveland and as a professor at the University of Dayton for 44 years. Bro. Donald Geiger will be remembered as a Professor, Scientist, Environmentalist and Marianist


Services: Due to the current high rate of COVID-19 infection and its impact on the Marianist Brothers, we regret that

services will be Private. Please join the Live-Streaming of the Mass of Christian Burial for Bro. Don at 10:30 am, Saturday, Jan. 9. Go to and click on the blue "Live Streaming QAC Masses" button, then look for the funeral Mass. GLICKLER FUNERAL HOME handling arrangements.

To Plant Memorial Trees in memory, please visit our Sympathy Store.
Published in Dayton Daily News on Jan. 7, 2021.
No memorial events are currently scheduled. To offer your sympathy during this difficult time, you can now have memorial trees planted in a National Forest in memory of your loved one.
Memories & Condolences
Guest Book sponsored by Glickler Funeral Home & Cremation Service
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3 entries
January 9, 2021
A tough but great Professor for whom I had great respect.
January 7, 2021
Bro. Don was my major professor while I worked to complete my MS in Biology (1969-1971). He is the reason I became a biologist, initially thinking that I would teach Biology, but then ultimately switching to being a research biologist. Beside the science that I learned from Don, I learned a number of life lessons as well, not the least of which is to have confidence and trust my own knowledge and skillset. He was a true mentor and friend, and he will be missed.
Bob Toia
January 7, 2021
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Robert Toia
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