Landgrave of Langeland
# Landgrave of Langeland

Landgrave of Langeland was a territorial title for the ruler of Langeland in Denmark. The county had its roots in the 1358 conquest of Langeland by Valdemar IV of Denmark against the Duke of Schleswig. Its capital was Tranekær Castle a 13th-century castle.

Before it was a separate lordship it was part of the Duchy of Schleswig. It was separated from the Duchy and given to a brother of the Duke of Schleswig. Langeland was assigned as a fief in the middle ages to various different people. These are the original lords of Langeland.

| Ruler | Born | Reign | Death | House | Consort | Notes |
| - | - | - | - | - | - | - |
| Abel, Lord of Langeland | 1218 | 1257-1279 | 1279 | Estridsen | a daughter of Gunzelin III, Count of Schwerin | Split with brother Eric I, Duke of Schleswig |
| Eric Longlegs, Lord of Langeland | 1272 | 1279-1310 | 1310 | Estridsen | Sophia of Querfurt | Nephew of the preceding |

In 1659 with the permission of the king the Count of Rantzau handed Tranekær county over to Frederik Ahlefeldt. He later became the Landgrave of Langeland in 1672.

| Ruler | Born | Reign | Death | House | Consort | Notes |
| - | - | - | - | - | - | - |
| Frederik Ahlefeldt | 1623 | 1672-1686 | 1686 | Ahlefeldt (noble family) | Margarethe Dorothea zu Rantzau | Title created for |
| Frederik Ahlefeldt II | 1662 | 1686-1708 | 1708 | Ahlefeldt (noble family) | Christiane Gyldenløve (1672-1689) | Son of the preceding |
| Carl Ahlefeldt | 1670 | 1708-1722 | 1722 | Ahlefeldt (noble family) | Ulrikke Antoinette Danneskiold-Laurvig | Brother of the preceding |
| Frederik Ahlefeldt III | 1702 | 1722-1773 | 1773 | Ahlefeldt (noble family) | Marie Elisabeth Ahlefeldt | Son of the preceding |
| Ulrik Carl Ahlefeldt | 1704 | 1722-1758 | 1758 | Ahlefeldt (noble family) | | Brother of the Preceding, apparently shared the title |
| Conrad Ahlefeldt | 1707 | 1722-1791 | 1791 | Ahlefeldt (noble family) | | Brother of the Preceding, apparently shared the title |
| Ferdinand Ahlefeldt | 1747 | 1791-1815 | 1815 | Ahlefeldt (noble family) | | Son of the preceding |
| Frederik Carl Christian Ulrich Ahlefeldt | 1742 | 1791-1825 | 1825 | Ahlefeldt (noble family) | Ditlefine Rantzau | Older brother of the preceding |
| Christian Ahlefeldt-Laurvigen | 1732 | 1173-1791 | 1791 | Ahlefeldt (noble family) | Elisabeth grevinde Juel | Son of Frederik Ahlefeldt III |
| Frederik Ahlefeldt-Lauervigen | 1760 | 1791-1832 | 1832 | Ahlefeldt (noble family) | Casta Magdalene Rasmussen | Son of the preceding |
| Christian Johan Frederik Ahlefeldt-Laurvig | 1789 | 1832-1856 | 1856 | Ahlefeldt (noble family) | | Nephew of the preceding |
| Frederik Ludvig Vilhelm Ahlefeldt-Lauervigen | 1817 | 1856-1889 | 1889 | Ahlefeldt (noble family) | Marie Albertine Mathilde Ahlefeldt-Laurvigen | Son of the preceding |
| Christian Johan Frederik Ahlefeldt-Laurvig II | 1844 | 1889-1917 | 1917 | Ahlefeldt (noble family) | Johanne Ida Birgitte Augusta | Son of the preceding |
| Frederik Ludvig Vilhelm Ahlefeldt-Laurvig II | 1870 | 1917-1947 | 1947 | Ahlefeldt (noble family) | No wife | Son of the preceding |
| Kai Benedict Ahlefeldt-Laurvig | 1903 | 1947-1985 | 1985 | Ahlefeldt (noble family) | | Nephew of the preceding |
| Ulrik Benedict Ahlefeldt-Laurvig | 1939 | 1985-2021 | 2021 | Ahlefeldt (noble family) | | Son of the preceding |
| Michael Ahlefeldt-Laurvig-Bille | 1965 | 2021–present | alive | Ahlefeldt (noble family) | Princess Alexandra of Sayn-Wittgenstein-Berleburg | Nephew of the preceding |
