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Part Of
Dr. Isadore M. Cass fonds
Fonds 40
Archival Descriptions
Part Of
Dr. Isadore M. Cass fonds
Material Format
textual record
graphic material
Physical Description
45 cm of textual records
14 photographs : b&w (8 negatives) ; 18 x 13 cm
Admin History/Bio
Dr. Isadore M. Cass (1916-1996), a well-known pathologist and practicing mohel--Jewish ritual circumcisor--for the Toronto Jewish community, was born and educated in Toronto, attending the University of Toronto's medical school. After serving with the army during the Second World War, Dr. Cass returned to Toronto to private practice. He began studying pathology in 1953, and performed research at the Ontario Cancer Institute, Connaught Labs and the Ontario Department of Health throughout his career. He was chief of pathology at Ajax and Pickering hospitals for twenty-three years, until his retirement in 1986.
In 1945, Dr. Cass began doing ritual circumcisions and was the first medical doctor in Toronto to do so. He performed over 40,000 circumcisions throughout Canada and the eastern United States and trained many physicians to perform them as well.
Dr. Cass was a member of the following organizations: New York Academy of Sciences; the Academy of Medicine, Toronto; the Israel Medical Association; General Wingate Branch of the Royal Canadian Legion; and many other associations and societies.
Dr. Cass studied Torah under Rabbi Jacob Gordon and was a Torah reader at Goel Tzedec Synagogue and later, Beth Tzedec. He also studied and taught Torah throughout his life, chairing the Canadian Jewish Congress' Tanach study group for many years, and leading weekly Gemara classes at Beth Tzedec. He belonged to Shaarei Shomayim and Beth Lida synagogues, as well as Lubavitch. In 1987, Dr. and Mrs. Cass were honoured as "Couple of the Year" by Machanaim, The Network of Educational Institutions in Kiryat Gat, Israel, for their great contributions to this charity over the years.
Dr. Cass was married to Miriam Cass and they had four daughters: Sharon, Hylah, Judy, and Elaine. He had four brothers: the late Rabbi Samuel Cass, Harry, Al, and Elie (who was a Reform mohel), and two sisters: Miriam Cass and Zelda Fink. He also had seven grandchildren and three great-grandchildren.
Dr. Cass died on January 24, 1996 of cancer.
Scope and Content
The fonds consists of records relating to the personal and professional life of Dr. Isadore Cass. These records include appointment books documenting circumcisions he performed, correspondence, writings, Tanach study group notes, a Machanaim invitation and programme, prayer books, certificates, memorial cards, and photographs.
Name Access
Cass, Isadore M., 1916-1996
Access Restriction
Partially closed. Researchers must receive permission from the OJA Director prior to accessing some of the records.
Physical Condition
The prayer book is in poor condition and some of the early daytimers are in fair condition.
Related Material
See also the Ontario Jewish Archives' reference news clipping file under "Cass, Dr. Isadore".
Cass, Isadore M., 1916-1996
Accession Number
Archival Descriptions

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