Goniamalimage John Anthony Flavian Aponso (born 28 October 1952 in Colombo, Sri Lanka), commonly as Flavian Aponso, is a former Sri Lankan first class and Dutch ODI cricketer, who played five One-day Internationals for The Netherlands during the 1996 World Cup. He is the first ODI cap for Netherlands.
Aponso represented Sri Lanka on one occasion before the country received Test status, playing against Tamil Nadu for the Gopalan Trophy in 1974–75. His participation with the rebel Arosa Sri Lanka side that toured South Africa in 1982–83 ensured a lifetime ban from cricket in Sri Lanka.
He moved to the Netherlands, playing for them in the 1990 and 1994 ICC Trophy tournaments, though he also played nine top-level matches for Sebastianites in Sri Lankan domestic cricket.