This nobility was a source of officers and other servants to Swedish and Polish kings in 16th and particularly 17th centuries, when Couronian, Estonian, Livonian and Oeselian lands belonged to them.
Governorate of Estonia, Князь Эстляндский, Knyaz' estlyandskii a viceroyalty of the Russian Empire from 1721 until 1917.
Estonia | Grand Duchy of Lithuania | Duchy of Brabant | Duchy of Saxony | Duchy of Carinthia | Duchy of Burgundy | Duchy of Cornwall | Grand Duchy of Hesse | Grand Duchy of Mecklenburg-Schwerin | Duchy of Parma | Chancellor of the Duchy of Lancaster | Duchy of Warsaw | Duchy of Prussia | Duchy of Jülich | Lorraine (duchy) | Grand Duchy of Baden | Duchy of Milan | Duchy of Mecklenburg-Schwerin | Duchy of Lancaster | Duchy of Holstein | Duchy of Savoy | Duchy of Nassau | Duchy of Limburg | Duchy of Württemberg | Duchy of Pomerania | Duchy of Luxembourg | President of Estonia | Grand Duchy of Oldenburg | Duchy of Spoleto | Duchy of Mecklenburg-Strelitz |