| Country: | England |
| Fullname: | William Francis Thomas O'Byrne |
| Birth Date: | 30 April 1908 |
| Birth Place: | Bromley, Kent, England |
| Death Place: | St Leonards-on-Sea, Sussex, England |
| Batting: | Right-handed |
| Club1: | Sussex |
| Year1: | 1935 |
| Columns: | 1 |
| Column1: | First-class |
| Matches1: | 1 |
| Runs1: | 34 |
| Bat Avg1: | 17.00 |
| 100S/50S1: | - / - |
| Top Score1: | 26 |
| Deliveries1: | - |
| Wickets1: | - |
| Bowl Avg1: | - |
| Fivefor1: | - |
| Tenfor1: | - |
| Best Bowling1: | - |
| Catches/Stumpings1: | 1/ - |
| Date: | 27 November |
| Year: | 2011 |
| Source: | http://www.espncricinfo.com/england/content/player/18302.html Cricinfo |
William Francis Thomas O'Byrne (30 April 1908 - 23 October 1951) was an English cricketer. O'Byrne was a right-handed batsman. He was born at Bromley, Kent.
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.[2] This was his only major appearance for Sussex.
He died at St Leonards-on-Sea, Sussex on 23 October 1951.