Possible Clues:

• Cyrus the Great defeated them
• How to tell the old folk that your name is Desmond
• The Persians conquered them under Cyrus the Great
• It's myself, Desmond, that used to be associated with the Persians
• A people with unalterable laws
• Persians of old
• Inhabitants of old Persia
• Media people
• Persian Empire people
• Desmond I am, old folk