Nicanor, Duke of Arpa
|Nicanor of Arpa|
|Crown Prince of Erlande and Roman Prince, Duke of Arpa
|Predecessor||Denis I of Erlande|
|House||House of Harte-Claudia|
|Mother||Natalia, the Queen mother|
|Born||25 September, between 2003 and 2005|
His Royal Highness Nicanor, 1st Duke of Arpa (russ. Никанор Алексеевич, 1-ый Герцог Арпийский) (born September 25, between 2003 and 2005) is the only brother of King Denis I of Erlande, received from Denis the title of Duke of Arpa. since 2015 is the nominal heir to the throne of Erlande. She has the titles of "the Only brother of the king" (fr. le Frère unique du Roi) and "Monsieur" (fr. Monsieur).
- April 30, 2015: – present His Royal Highness the Crown Prince of Erlande, the Roman Prince, Duke of Arpa, Prince of Haurti and the first king's brother.