Colegio Marista Guaynabo was created in 1963.
Colégio Marista Dom Silvério was created in 1950.
Olivos Rugby Club was created in 1927.
Spartacus Rugby Club was created in 1968.
Eastwood Rugby Club was created in 1927.
Westmount Rugby Club was created in 1874.
Heriot's Rugby Club was created in 1890.
Hitchin Rugby Club was created in 1954.
Banco Rugby Club was created in 1991.
Boston Rugby Club was created in 1927.
Millwall Rugby Club was created in 1995.
Amoskeag Rugby Club was created in 1984.