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.
What does Aditya mean?
From Sanskrit Aditya (आदित्य), 'belonging to Aditi', a name of the sun god Surya and collectively of the solar deities born of the goddess Aditi. A well-attested classical name meaning 'the sun'.