Duke vs Royal

Duke

• A male given name from English; mostly US and rather rare. 

• A male nickname 

• The American actor John Wayne. 

• The title of a duke. 

• A surname originating as an occupation for service in the household of a duke, or from a nickname. 

Royal

• A male given name from English from the surname 

• A surname from Old English. 

• A male given name from the word "royal". 

• A member of the first regiment of foot in the British army. 

• someone connected with Reading Football Club, as a fan, player, coach etc.