Portugal:
1140 (independent republic proclaimed 5 October 1910)
Puerto Rico:
none (commonwealth associated with the US)
Qatar:
3 September 1971 (from UK)
Reunion:
none (overseas department of France)
Romania:
1881 (from Turkey; republic proclaimed 30 December 1947)
Russia:
24 August 1991 (from Soviet Union)
Rwanda:
1 July 1962 (from Belgium-administered UN trusteeship)
Saint Helena:
none (overseas territory of the UK)
Saint Kitts and Nevis:
19 September 1983 (from UK)
Saint Lucia:
22 February 1979 (from UK)