Sebastian Chabal for one.
Suprisingly it is a Canadian rugby player, Myles Cavendish
A "cap" is awarded to a player who plays for their international side
Sebastien Chabal was born in Valence Drome France. His claim to fame is as an international Rugby player representing France in 62 matches. Because of his beard, hair and ruthless tackling , his fans nicknamed him "The Caveman".
I don’t really know
I dont know which, if any, of the following played at international level but these are all listed in the Schools Alumni. John Gwilliam (born 1923), rugby player Keith Jarrett (born 1948), rugby player Eddie Butler (born 1957), rugby player / TV commentator Wayne Barnes (born 1979), International rugby union referee