Or·ange·man 
(ôrĭnj-mən, ŏr-)
(ôrĭnj-mən, ŏr-)n.
1. A member of a secret society founded in Northern Ireland in 1795 to maintain the political and religious ascendancy of Protestantism.
2. A Protestant Irishman.
[After William, Prince of Orange, later King William III of England, Scotland, and Ireland.]