Dr. Daniel James Sweeney was born in Caledon, Peel County, Ontario on the 4th of March, 1877. His parents, Charles Sweeney and the former Margaret Tighe were farmers. Dr. Sweeney was the youngest of 4 children. His siblings were; Hugh, Ellen and Charles.
Dr Sweeney graduated from Orangeville High School and obtained his teachers certificate. He taught school in Ottawa until the fall of 1899 when he entered medical school. Dr. Sweeney graduated M.B. from The University of Toronto Faculty of Medicine in 1903.
He married Florence Johanna Price on the 29th of November, 1905 in York (now Toronto), Ontario. She was the daughter of Thomas L. Price and the former Elizabeth Flanaghan. She was born in New Zealand in 1881.
Dr. and Mrs. Sweeney had 4 children; Winston Hugh Price Sweeney was born on the 21st of July 1906 in Toronto, Margaret L.P. Sweeney was born on the 23rd September of 1908 in Toronto, Morris Charles Price Sweeney was born in December of 1910 in Toronto and Florence Mary Sweeney was born on the 7th of May, 1913 in Victoria Harbour, Simcoe County, Ontario.
Dr. Sweeney moved his family to Tilbury, Ontario in December of 1913. Sadly, their son Winston died in Tilbury on the 12th of October, 1915 of diptheria. He was buried at St. Francois Cemetery in Tilbury Township.
On September 29th, 1916 during World War I, Dr. Sweeney enlisted in the Canadian Armed Services as a Captain. His residence at the time was listed as Tilbury, Ontario. After his discharge from the war, Dr. Sweeney and his wife moved their family to Wetaskiwin, Alberta, according to the 1921 census.
Dr. Sweeney died on November 11th, 1949 in New Westminster, British Columbia.