|Full name||William Cornelius|
|Date of birth||1898|
|Place of birth||Belvedere, London, England|
|–1922||Belvedere & District||–||(–)|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
William "Billy" Cornelius (born 1898) was an English professional football player and manager.
Cornelius was born in Belvedere, London in 1898. He played football for Belvedere & District, before venturing to France in 1922 to join FC Sète. Cornelius was brought over to the country along with fellow countryman Arthur Parkes by Scottish coach Victor Gibson. With Sète, he played in the 1923 Coupe de France Final against Red Star Olympique. In the match, Cornelius scored the team's opening goal, however, the club was unable to overcome the 3–1 deficit and were defeated 4–2. After his stint with Sète, Cornelius joined Olympique Alès and served in a player-coach role.
- Lafranchi, Pierre (2001). Moving with the Ball: The Migration of Professional Footballers. Berg Publishers. p. 52. ISBN 1-85973-302-6.
- "Search Records". Genes Reunited. Retrieved 21 January 2011.
- "Finale le 06/05/1923, Paris (Pershing)" (in French). French Football Federation. Retrieved 21 January 2011.
- "The French Menace; The Migration of British players to France in the 1930s". Soccer History. Retrieved 21 January 2011.
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