William Francis Thomas O'Byrne (30 April 1908 – 23 October 1951) was an English cricketer.
O'Byrne made a single first-class appearance for Sussex against Cambridge University at the County Ground, Hove in 1935.
[1] In Sussex's first-innings, he was dismissed for 8 runs by James Cameron.
In their second-innings, he was dismissed for 26 runs by the same bowler.
He died at St Leonards-on-Sea, Sussex on 23 October 1951.