Hyppolite was the star player on Haiti's side at the 2014 Quidditch World Cup, responsible for eight of their nine goals against Brazil, although they ultimately lost the match after their Beater was disqualified (Pm).
Other canon notes and references
Clairvius may derive from a Haitian man, Clairvius Narcisse, who was allegedly turned into a zombie - especially appropriate given Haiti's Inferi mascots (Wikipedia). The word clair comes from Latin clarus, meaning "clear, light, famous" (Baby Namespedia).
Hyppolite is the surname of a famous Haitian painter, Hector Hyppolite. The Old Greek name Hippolyte means "freer of horses" (Baby Namespedia).
From the Web
Screenshots of the Daily Prophet's coverage of the 2014 Quidditch World Cup: http://imgur.com/a/AXutv