Before The Best Night Ever aired, Lauren Faust stated that Celestia's nephew had no name in the show and that he's the "great great great great great great great great great great great (and probably even more greats) nephew on Celestia's and Luna's mother's side, about 52 times removed, roughly speaking." He was originally a Duke, but was changed to a Prince because "someone in the approval process thought kids wouldn't know what a Duke is", though the title of Duke would eventually be used for other ponies much later. "Blueblood" is an English idiom for "nobility", or being of noble birth or descent.