Seriously, How Do You Pronounce "Charon?"

New Horizons is set to answer lots of questions, but the deepest mystery of all is one of linguistics. How the hell do you actually pronounce Charon?
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What we have so far:

Kar-on
Kare-on
Shar-on
Share-on
Sauron
Cuarón
Sharon
Sharona
Jiff

Your thoughts?

(Thanks for the punchline, Paul Sabourin.)