Remembering Brother Tim Seitz

SEITZ, Donald “Tim”

Donald “Tim” Seitz died peacefully at Kingston General Hospital before noon on Saturday, February 3, 2024 after a 5-year decline with dementia. Tim was born on April 7, 1938 in Wyandotte, Michigan to Lillian (Hostik) and William “Don” Seitz. He loved and was loved by his wife, Joanna (Gostomski), his son Donald, and his daughters Gretchen (and husband David Deskin), Sarah, and Rachel (who passed away in 2019). He is fondly remembered by his grandchildren, Mitchell and Steven Seitz, and Zoë and Noah Deskin, as well as his many nieces and nephews. Tim is survived by his sister, Carolyn (John) Paulitch, and his brother Geoff (Carol) Seitz. He was well loved by Joanna’s family: her parents Joe and Sophie (both deceased), Ray (deceased) and MaryAnn Gostomski, Rosalie and Frank Tislerics, Gerry and Linda Gostomski, and Janet and Dennis (deceased) Gilbo. He was predeceased by his faithful dogs Thatcher and Tilly.

Many who knew Tim would call him a character. He was a proud, intelligent iconoclast who was unafraid of holding an alternative view or challenging the status quo. He was always a deep thinker, with a lifelong curiosity about the world we live in and the universe beyond – a curiosity he encouraged in his kids and grandkids, and the many students he taught over his long career teaching Mathematics, Computers and Religion both in the US and Canada. He taught at both Regiopolis-Notre Dame and Holy Cross Secondary Schools in Kingston, retiring in 2003. He was an avid lover of Classical and Flamenco music, and was an accomplished guitarist himself. He also loved fishing, stargazing, and the outdoors; often fondly remembering outings in the bush in Northern Ontario. He became an ardent and vocal critic of nuclear power and nuclear armaments out of his love of nature and concern for future generations.

Thank you to Doctors Payne, Wu and Tran, nurses Kara, Erika and Hilary, and all the staff of Connell 3. Their kind support made the journey easier.

Family will be receiving friends on Saturday, February 10, 2024 at 11:00 a.m., at the Gordon F. Tompkins Funeral Home, Township Chapel, 435 Davis Drive, Kingston, followed by a Service in the chapel at 12:00 p.m.

To honour Tim’s memory, you may wish to donate to the Ontario Clean Air Alliance or to the Canadian Coalition for Nuclear Responsibility. Sharing of online memories is available at

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