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Oldenburg
· State
Grand Duke of Oldenburg
One holder at a time · 5 terms · 1774–1918
Previous holders
5
Frederick Augustus II of Oldenburg
1900–1918
Peter II of Oldenburg
1853–1900
Augustus, Grand Duke of Oldenburg
1829–1853
Peter I of Oldenburg
Duke
1785–1829
Frederick August I of Oldenburg
Duke
1774–1785