The Honourable Leslie Miscampbell Frost, lawyer and Premier of Ontario, was born in Orillia, Ontario on September 20, 1895, the son of William Sword Frost and Margaret Jane Barker. He was educated at the Orillia Public School and the Orillia High School. He later attended the University of Toronto and Osgoode Hall. He served during World War I in France and Belgium, with the 20th Battalion, Queen's York Rangers, and was discharged with the rank of captain in 1918, after being severely wounded. Frost was called to the Bar in 1921. He was a member of the legal firm Frost, Inrig and Gorwill, among others, and was an honorary bencher of the Law Society of Upper Canada. He married Gertrude Jane Carew in 1926. They never had children. Leslie M. Frost had a long and successful political career. He was first elected to the legislature of Ontario in 1937, and he was consistently re-elected at each election until his retirement in 1963. He was Treasurer of Ontario and Minister of Mines in both the George Drew and T.L. Kennedy administrations. In 1949, Frost was chosen leader of the Ontario Progressive Conservative Party, and was sworn in as Premier and Provincial Treasurer on May 4, 1949. He remained Provincial Treasurer until 1955 and Premier until 1961. Besides his legal and political career, Frost took on many other obligations. He was a member of the of the Board of Governors of the University of Toronto and the first Chancellor of Trent University. He also held several directorships, including: the Bank of Montreal, Air Canada, Corporate Investors Ltd., Lever Brothers Ltd., KVP Company Ltd., John Deyell Ltd., Canada Life Assurance Company, Victoria and Grey Trust Co., Massey-Ferguson Ltd., and radio station CKLY. Frost was also keenly interested in history, primarily military history and the histories of Victoria, Peterborough and Haliburton Counties. He was the author of several books: Fighting Men, Forgotten Pathways of the Trent, Pleasant Point Story: a History of Pleasant Point and The Records on Sam Hughes Set Straight. Leslie M. Frost died at Lindsay, Ontario 4 May 1973.
Cecil Grey Frost, younger brother of the Honourable Leslie M. Frost, was born in Orillia, Ontario, on August 27, 1897. His father, William Sword Frost, operated a jewellery and watchmaking business in Orillia, and as Mayor, introduced the concept of daylight saving time to the municipality. Cecil Grey Frost served overseas with the Canadian Machine Gun Corps during the World War I. When he returned to Canada, he attended Osgoode Hall Law School and graduated in 1921. He and his brother Leslie then opened a legal firm in Lindsay, Ontario, and both soon became active in local Conservative Politics. This led to Cecil's election in 1936 as Mayor of Lindsay, and in 1937 to the Presidency of the Ontario Conservative Association, As well, he organized and managed Earl Rowe's campaign in the provincial election of 1937. Thought of as a potential party leader himself, Cecil Grey Frost remained politically active until his sudden death on 8 June 1947.