| 1 | Scots | jouk | To duck; to move away quickly to avoid ; to... |
| 2 | Scots | deuk | duck |
| 3 | Middle English | duke | leader, guide, commander, boss; noble, lord; duke |
| 4 | Old French | duc | duke |
| 5 | Latin | dux | leader, head; commander, general, captain;... |
| 6 | Latin | dūcō | — |
| 7 | Proto-Italic | doukō | lead |
| 8 | Proto-Indo-European | déwketi | — |
| 9 | Proto-Indo-European | dewk- | to pull, to draw; to lead |