Corneille "Cornelis" Henri Albert Wellens (14 July 1905 – 9 October 1994) was a Belgian field hockey player who competed in the 1928 Summer Olympics and in the 1936 Summer Olympics.
Wellens was a member of the Belgian field hockey team which finished fourth in the 1928 Olympic tournament. He played all five matches as back.
Eight years later he was part of the Belgian team which was eliminated in the first round of the 1936 Olympic tournament. He played all three matches.
Wellens was born in Etterbeek on 14 July 1905.
Wellens married Marguerite du Castillon, and was the father of banker Jean Pierre Wellens (1935–2023), former director of ING Bank, of BBL, and of Brouwerij Haacht, and co-creator of the Eurobonds.
Wellens died in Uccle on 9 October 1994, at the age of 89.