| Clausenburg | Cluj-Napoca |
| Klausenburg | Cluj-Napoca |
| Lauenburg | Lauenburg |
| Ladenburg | Ladenburg |
| Laxenburg | Laxenburg |
| Neulauenburg | Duke of York Islands |
| Weißenburg | Belgrade |
| Neuenburg | Neuchâtel |
| Plintenburg | Visegrád |
| Waldenburg | Wałbrzych |
| Altenburg | Altenburg |
| Brandenburg | Brandenburg |
| Wagenburg | wagon fort |
| Lüneburg | Lüneburg |
| Luxemburg | Luxembourg |
| Wasserburg | moated castle |
| Claustrum | claustrum |
| Claqueur | claqueur |
| Clause | clause |
| Klausner | anchorite hermit |