Brigadier-General Donald Robert Agnew, CB CBE CD ADC (October 25, 1897 – August 7, 1968) was a Canadian general and educator.
Following the death of Daisy Edith Stocks in 1902, Major John Agnew married Elizabeth Dickenson, of Toronto.
While her husband and sons were overseas during the war, Mrs. Elizabeth Agnew moved temporarily to Hamilton, Ont.
He returned to RMC in Kingston as commandant and ADC to the governor-general (1947–54).
He inaugurated the Old Brigade, for alumni celebrating 50 years since they entered one of the Canadian Royal Military Colleges in 1950.