Grand duke
Synonyms for Grand duke
- king
- baron
- earl
- potentate
- emperor
- count
- prince
- sovereign
- marquis
- duke
- viscount
- baronet
- daimio
- royal duke
- archduke
- tsar
- elector
- suzerain
- crown prince
- princeling
- prince regent
- mogul
- liege
- liege lord
For more similar words, try Grand duke on Thesaurus.plus dictionary