Boyle, County Roscommon
Tony Brennan was born in Clonoulty, County Tipperary in 1916 to a family steeped in sporting history. His uncles, on his father's side, were outstanding athletes in their day in their native place of Boyle, County Roscommon. A maternal uncle was Phil Byrne who won four All-Ireland hurling medals with Tipperary in 1895, 1896, 1898 and in 1899. Another uncle, Tom Byrne, won two All-Ireland football medals with Dublin in 1892 and 1894.