Fun fact: Most daemons aren’t using their original names, but are named according to their element (in a made-up ancient language). Some do opt to keep their birth names, like Rava’s mysterious boss/friend/psuedo-mother Leandra. ‘Argent’ is simply ‘Silver’ in French (also ‘money,’ but Anor was named for his silver hair and eyes), and I would love to spell out its pronunciation phonetically for you, but English doesn’t have the right sounds, so have a youtube video: