Duke of Schleswig: the rulers on the tree
12 holders of the title Duke of Schleswig on the tree, 1183–1864, from Estridsen (8), Oldenburg (3), Glücksburg (1). The list is the one on this tree, not a complete one: some reigns are not recorded in Wikidata.
| 1183–1216 | Valdemar II of Denmark | Estridsen |
| 1232–1252 | Abel of Denmark | Estridsen |
| 1253–1257 | Valdemar III, Duke of Schleswig | Estridsen |
| 1257–1272 | Eric I, Duke of Schleswig | Estridsen |
| 1283–1312 | Valdemar IV, Duke of Schleswig | Estridsen |
| 1312–1325 | Eric II, Duke of Schleswig | Estridsen |
| 1325–1364 | Valdemar III of Denmark | Estridsen |
| 1364–1375 | Henry, Duke of Schleswig | Estridsen |
| 1513–1523 | Christian II of Denmark | Oldenburg |
| 1839–1848 | Christian VIII of Denmark | Oldenburg |
| 1848–1863 | Frederick VII of Denmark | Oldenburg |
| 1863–1864 | Christian IX of Denmark | Glücksburg |