What does Arjun mean?
From Sanskrit arjuna (अर्जुन), 'white, bright, silvery, clear'. Best known as the heroic third Pandava prince and Krishna's friend in the Mahabharata; the literal root sense is 'shining/white' rather than 'warrior'.
What does Aryan mean?
From Sanskrit arya (आर्य), 'noble, honourable, worthy'. The original sense is one of nobility and virtue; it is unrelated to later misappropriations of the term.