List of rulers named Ernst
The following rulers were called Ernst :
Ernst I.
- Ernst I. , Grenzgraf im Nordgau, † 865, see Ernst (Nordgau)
- Ernst I. (Swabia) , Duke (1012-1015)
- Ernst I (Braunschweig-Göttingen) , Duke (1318–1367)
- Ernst I (Braunschweig-Grubenhagen) , Duke of Osterode (1322–1361)
- Ernst I of Baden-Durlach , Margrave (1533), see Ernst (Baden-Durlach)
- Ernst I (Braunschweig-Lüneburg) , Duke (1520–1546)
- Ernst I (Saxe-Gotha-Altenburg) , Duke (1601–1675)
- Ernst I (Hessen-Rheinfels-Rotenburg) , Landgrave (1658–1693)
- Ernst I (Saxe-Coburg and Gotha) , Duke (1784–1844)
- Ernst I (Sachsen-Altenburg) , Duke (1826–1908)
- Ernst I. zu Hohenlohe-Langenburg , non-ruling prince (1794–1860)
Ernst II
- Ernst II (Swabia) , Duke (1015-1030)
- Ernst II (Braunschweig-Grubenhagen) , Duke of Herzberg († around 1400)
- Ernst II (Braunschweig-Lüneburg) , Duke (1592–1611)
- Ernst II (Saxe-Gotha-Altenburg) , Duke (1772–1804)
- Ernst II (Saxe-Coburg and Gotha) , Duke (1844-1893)
- Ernst II (Sachsen-Altenburg) , Duke (1908–1918)
- Ernst II. Leopold (Hessen-Rotenburg) , Landgrave (1725–1749)
- Ernst II zu Hohenlohe-Langenburg , non-ruling prince
- Ernst II of Saxony , Archbishop of Magdeburg (1476–1513)
Ernst III.
- Ernst III. (Braunschweig-Grubenhagen) (1518–1567), Duke of Braunschweig-Grubenhagen
- Ernst III. von Habsburg (1553–1595), governor of Lower Austria, see Ernst von Österreich (1553–1595)
- Ernst III. von Sachsen-Coburg-Saalfeld (1784–1844), Duke of Sachsen-Coburg-Saalfeld, see Ernst I. (Sachsen-Coburg and Gotha)
Ernst IV.
- Ernst III. (Braunschweig-Grubenhagen) , Duke († 1567)
- Ernst IV. (Mansfeld-Eisleben) , Count
Ernst VII.
- Ernst VII von Hohnstein (1562–1593), Count
Serious...
- Ernst von Hessen-Philippsthal (1846–1925), Landgrave of Hessen-Philippsthal
- Ernst August (Braunschweig) , Duke (1913–1918)
- Ernst August (Hanover) , Elector (1629–1698)
- Ernst August I (Hanover) , King (1771–1851)
- Ernst August I (Saxe-Weimar-Eisenach) , Duke (1688–1748)
- Ernst August II (Saxe-Weimar-Eisenach) , Duke (1756–1758)
- Ernst August II of Hanover , Prince-Bishop of Osnabrück (1674–1728)
- Ernst August von Hanover (1845–1923) , Crown Prince of Hanover, Duke of Braunschweig-Lüneburg
- Ernst Casimir (Nassau-Dietz) , Count and governor of Friesland (1620–1632)
- Ernst Casimir I of Ysenburg and Büdingen (1781–1852)
- Ernst Casimir II of Ysenburg and Büdingen (1806–1861)
- Ernst Friedrich I (Saxony-Hildburghausen) , Duke (1715–1724)
- Ernst Friedrich II (Saxony-Hildburghausen) , Duke (1724–1745)
- Ernst Friedrich III. (Saxony-Hildburghausen) , Duke (1748–1780)
- Ernst Friedrich (Saxe-Coburg-Saalfeld) , Duke (1864–1800)
- Ernst Friedrich (Baden-Durlach) , margrave (1584–1604)
- Ernst Günther (Schleswig-Holstein-Sonderburg-Augustenburg) , Duke (1609–1689)
- Ernst Johann von Biron , Duke of Courland (1737–1772)
- Ernst Ludwig (Hesse-Darmstadt, Grand Duke) , Grand Duke (1892–1918)
- Ernst Ludwig (Pomerania) , Duke (1569–1592)
- Ernst Ludwig (Hessen-Darmstadt, Landgrave) , Landgrave (1678–1739)
- Ernst Ludwig I (Saxony-Meiningen) , Duke (1672–1724)
- Ernst Ludwig II (Saxe-Meiningen) , Duke (1726–1729)
- Ernst (Bavaria) (1373–1438), Duke of Bavaria-Munich
- Ernst von Bayern (1438–1460) , son of Duke Albrecht III. from Bayern-Munich
- Ernst von Bayern (1500–1560) , Prince of Bavaria, administrator of Passau and Salzburg, pledgee of the County of Glatz
- Ernst von Bayern (1554–1612) , Prince of Bavaria, Archbishop of Cologne
- Ernst (Anhalt) (1454–1516), Prince of Anhalt-Dessau
- Ernst (Bavaria) , Duke (1397–1438)
- Ernst the Iron , Duke of Austria (1402–1424)
- Ernst of Austria (1553–1595) , Archduke
- Ernst (Saxony) , Elector (1467–1486)
- Ernst zur Lippe-Biesterfeld , Prince (1897–1904)
- Ernst (Austria) , Margrave (1055-1075)
- Ernst (Schaumburg) , Count of Holstein-Pinneberg (1601–1622)
- Ernst (Troppau) , Duke of Troppau (1433–1461) and Duke of Münsterberg (1452–1456)