The name Cuthbert is a boy's name of English origin meaning "famous, brilliant". Cuthbert and is often added to lists like Names from Harry Potter and discussed in our forums with posts like "Release the 20 T.I.G.E.R.S. -- the anti-elimination game! (BOYS)".
From the experts:
Years ago we might have said that this name was unthinkable, but with old-fashioned names being so popular right now (consider Atticus, Leonidas, Arthur, Jasper, Augustus etc) what's to stop Cuthbert from becoming more wearable? Bertie is a cute (and very fashionable) nickname option for this grand old name.