Frederick McIntosh (Fred) Cass Q.C. ( August 5, 1913 – November 25, 2000) was a Canadian politician who served as both Attorney-General of Ontario and Speaker of the Legislative Assembly. He served as a Progressive Conservative Member of Provincial Parliament from 1955 until his retirement in 1971. Cass served in the Canadian Armed Forces from 1941 to 1945.
Born in Chesterville, Ontario, Cass was the older son of William Joseph Mavety Cass and Agnes Isabel (McIntosh) Cass, whose great-grandfather was John McIntosh, of apple fame. He was called to the Bar in Ontario in 1936 and joined his father, who had been called to the Bar in 1911, in the practice of law under the firm name, Cass & Cass. His wife, Olive, was herself the daughter of a former provincial politician, William H. Casselman, who represented Dundas as a United Farmers of Ontario member from 1919 to 1923.
Cass represented the riding of Grenville—Dundas just south of Ottawa. He first won a seat in the 1955 provincial election. He was appointed to provincial cabinet in 1958 as Minister of Highways under Leslie Frost and became known as the cabinet's troubleshooter. In 1961, Frost retired and Cass was considered one of his potential successors. Instead, he supported provincial treasurer James Allan at the party's leadership convention. Allan was defeated by John Robarts, who appointed Cass Minister of Municipal Affairs, and later, Attorney General in 1962.
Frederick Cass DL (19 September 1787 - 17 May 1861) was High Sheriff of Hertfordshire, 1844-45. He was resident at Beaulieu Lodge, Winchmore Hill, Edmonton, and later Little Grove, East Barnet.
Cass was born at Walthamstow on 19 September 1787. His father was William Cass of Beaulieu Lodge, Winchmore Hill, a merchant, and his mother was Elizabeth.
Cass was a Deputy Lieutenant, justice of the peace, and High Sheriff of Hertfordshire for 1844-45.
Cass married Martha Potter of Ponder's End on 13 March 1823 and the couple had a son Frederick Charles Cass, born at Beaulieu Lodge on 4 September 1824, who was rector of the parish of Monken Hadley in north London and a distinguished local historian. Frederick Cass willed the relevant advowson to his son. Another of their sons, Arthur Herbert Cass, was a Major in the 10th Royal Hussars and fought in the Battle of Chernaya during the Crimean War.
Cass was resident at Beaulieu Lodge, Winchmore Hill, Edmonton, and later Little Grove, East Barnet.