Ro or RO may refer to:
Romania ( (listen) ro-MAY-nee-ə; Romanian: România [romɨˈni.a] (listen)) is a country located at the crossroads of Central, Eastern and Southeastern Europe.
Ronald Wilson Reagan (; February 6, 1911 – June 5, 2004) was an American politician who served as the 40th president of the United States from 1981 to 1989. Prior to his presidency, he was a Hollywood actor and union leader before serving as the 33rd governor of California from 1967 to 1975.
Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American actor and comedian. Born in Chicago, Williams began performing stand-up comedy in San Francisco and Los Angeles in the mid-1970s, and is credited with leading San Francisco's comedy renaissance.
Rome (Latin and Italian: Roma [ˈroːma] (listen)) is the capital city and a special comune of Italy (named Comune di Roma Capitale).
Roger Federer (German pronunciation: [ˈrɔdʒər ˈfeːdərər]; born 8 August 1981) is a Swiss professional tennis player who is currently ranked world No.
The Romani (also spelled Romany , ), colloquially known as Gypsies or Roma, are an Indo-Aryan ethnic group, traditionally itinerant, living mostly in Europe and the Americas and originating from the northern Indian subcontinent, from the Rajasthan, Haryana, and Punjab regions of modern-day India.Genetic findings appear to confirm that the Romani "came from a single group that left northwestern India about 1,500 years ago." Genetic research published in the European Journal of Human Genetics "revealed that over 70% of males belong to a single lineage that appears unique to the Roma." They are a dispersed people, but their most concentrated populations are located in Europe, especially Central, Eastern and Southern Europe (including Turkey, Spain and Southern France).
Rock music is a broad genre of popular music that originated as "rock and roll" in the United States in the early 1950s, and developed into a range of different styles in the 1960s and later, particularly in the United Kingdom and in the United States.
Robert I (11 July 1274 – 7 June 1329), popularly known as Robert the Bruce (Medieval Gaelic: Roibert a Briuis; modern Scottish Gaelic: Raibeart Bruis; Norman French: Robert de Brus or Robert de Bruys; Early Scots: Robert Brus; Latin: Robertus Brussius), was King of Scots from 1306 until his death in 1329. Robert was one of the most famous warriors of his generation, and eventually led Scotland during the First War of Scottish Independence against England.