Soviet Union | European Union | Union Army | rugby union | Union | Utrecht | International Telecommunication Union | trade union | Utrecht (city) | Union (American Civil War) | Union Pacific Railroad | England national rugby union team | American Civil Liberties Union | Wales national rugby union team | New Zealand national rugby union team | Ireland national rugby union team | Western Union | Scotland national rugby union team | International Astronomical Union | Georgia national rugby union team | Trade union | International Union for Conservation of Nature | Border Union Railway | France national rugby union team | United States national rugby union team | South Africa national rugby union team | Communist Party of the Soviet Union | Amateur Athletic Union | Union Carbide | Australia national rugby union team |
From 1907–2003, the PNCC was a member of the Old Catholic Union of Utrecht.