| Cornelius Seys | |
| Birth Date: | 12 February 1912 |
| Birth Place: | Antwerp (Belgium) |
| Death Date: | 10 January 1944 |
| Years1: | 1930–1943 |
| Clubs1: | Beerschot VAC |
| Nationalyears1: | 1938 |
| Nationalteam1: | Belgium |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
Corneel "Neel" Seys (12 February 1912 – 10 January 1944) was a Belgian footballer. He was born in Antwerp.
He was a defender for Beerschot VAC from 1930 to 1943.[1] With the Antwerp team, he twice won the Belgian First Division, in 1938 and 1939.
He played twice for the Diables Rouges, including one match at the 1938 World Cup.[2]