The eldest of the 11 children of James Adam Marr (1859-1914),[2] and Elizabeth May Marr (1864-1912), née Midolo,[3] Joseph Thomas Marr was born at Richmond, Victoria on 9 August 1880.
Although the VFL records (perhaps retrospectively constructed) seem to follow those of the Carlton Football Club[4] and the Essendon Football Club records have him as, simply, "J.T. Marr",[5] given that:
(a) none of his 10 siblings were called "Thomas", the death notices for his mother and his father indicate that he was known to his family as "Thomas", rather than as "Joseph",
(b) at his marriage, on 19 August 1934, he was identified as "Thomas Joseph Marr",
(c) as early as 1934, his electoral roll entry was showing "Thomas Joseph Marr", and
(d) his death notice, and his gravestone, indicate that, although his birth was registered as "Joseph Thomas Marr", he was known as "Thomas Joseph Marr" — at least, in his later adult life.
Holmesby, Russell; Main, Jim (2009). The Encyclopedia of AFL Footballers: every AFL/VFL player since 1897 (8th ed.). Melbourne: Bas Publishing. ISBN978-1-921496-00-4
Maplestone, M., Flying Higher: History of the Essendon Football Club 1872–1996, Essendon Football Club, (Melbourne), 1996. ISBN0-9591740-2-8