The name Arnold is a boy's name of English origin meaning "ruler, strong as an eagle". Arnold and is often added to lists like Names with Animal Meanings and discussed in our forums with posts like "Picky Parents BNG".
From the experts:
Strange as it may now seem, the venerable St. Arnold was a Greek by birth, a musician who became a member of the court of Charlemagne. The name is said to have been introduced into Britain by the Normans in the form Arnaud.
Despite such reputable namesakes as composer Arnold Schoenberg, novelist Arnold Bennett and historian Arnold Toynbee, not to mention the former Governator, Arnold's image has been diminished by some nerdy fictional characters, though he is still a genuine classic who might come back along with Arthur and Albert.