Lupin or Lupon?

Lupin is a french name (He is the grandson of Arsene Lupin, a famous literary Gentleman Burglar). The correct pronunciation of Lupin is something like Loo- as in lunatic or lunar, pah as in PArtisan POlitics or POlygon. And of course the n is just an N sound as in new, neat, nowhere, nobody, nice, etc.... So, the overall pronunciation should be

Lupin(Loo-pah-n)

The Japanese write it as ルパン　or Rupan to more closely match the french pronunciation than the spelling itself. Since there are no L's in Japanese and each vowel has a specific pronunciation (a(ah)-e(eh)-i(ee)-o(oh)-u(oo)) they spell it Rupan to match with the french sound of Lupin.

Unfortunately, some dub companies misprounce it. I have heard Loo-pawn with a W sound, close but not quite on the money. I have also heard Loo-pihn as in safety pin. I believe some have also pronounced it Loo-peen. All of those are incorrect. The proper pronunciation is above.