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• Rabaut Saint-Étienne, Jean-Paul
• RABAUT-SAINT-ÉTIENNE, Jean-Paul
• Rademaker Grünewald, Augusto Hamann
• Rahimbaev, Abdullo
• Ramadier, Paul
• Ramos, Nereu de Oliveira
• Ramsay, David
• Randolph, Peyton
• Rau, Johannes
• Raveaux, Franz
• Reagan, Ronald
• Renner, Karl
• Republic of Indonesia: Archontology
• Republic of Indonesia: Heads of State: 1945-1950
• Republic of Indonesia: Polity Style: 1945-1950
• REUBELL, Jean-François
• REUBELL, Jean-François
• Reubell, Jean-François
• Reubell, Jean-François
• Reynolds, Albert (Ailbhe Mac Raghnaill)
• Rhodesia: Archontology
• Rhodesia: Heads of State: 1965-1979
• Rhodesia: Polity Style: 1965-1979
• Rhodesia: Sources
• Richard I
• Richard II
• Richard III
• Riel de Beurnonville, Pierre
• Rif: Archontology
• Rif: Heads of State: 1921-1926
• Rif: Polity Style: 1921-1926
• Rijeka (Fiume): Archontology
• Rijeka (Fiume): Heads of Administration: 1918-1924
• Rijeka (Fiume): Polity Style: 1918-1924
• Rivero, Nicolás María
• Robert II (Scotland)
• Robert III (Scotland)
• Robespierre, Maximilien
• Robinson, Mary (Mhic Róibín, Máire)
• ROCHESTER, 1st Earl of
• ROCKINGHAM, 2nd marquess of
• Rodionov, Mikhail Ivanovich
• Rodrigues Alves, Francisco de Paula
• Rodriguez, Abelardo L.
• Rodríguez de Valcárcel, Alejandro
• Romania: Archontology
• Romania: Heads of State: 1862-1866
• Romania: Heads of State: 1866-1947
• Romania: Heads of State: 1947-1989
• Romania: Heads of State: 1989-2021
• Romania: Polity Style: 1861-2021
• Romme, Gilbert
• Roosevelt, Franklin
• Roosevelt, Theodore
• ROSEBERY, 5th earl of
• Rous, Francis
• RUSSELL, Lord John
• Russia/USSR: Heads of Government: 1924
• Russia: All-Russian Provisional Government: 1918
• Russia: Archontology
• Russia: Heads of Government: 1905-1917
• Russia: Heads of Government: 1917-1991
• Russia: Heads of Government: 1991-1992
• Russia: Heads of Government: 1991-2021
• Russia: Heads of Provisional Government: 1917
• Russia: Heads of State: 1547-1917
• Russia: Heads of State: 1917-1991
• Russia: Heads of State: 1991-2021
• Russia: Sources
• Russia: Supreme Ruler: 1918-1920
• Rwanda: Archontology
• Rwanda: Heads of State: 1961-2021
• Rwanda: Polity Style: 1961-2021
• Rwanda: Sources
• Rykov, Aleksej (USSR)
• Rykov, Aleksey Ivanovich
• RYZHKOV, Nikolaj Ivanovič
• Rühl, Philippe

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