What are correct pronunciation for these famous physicians last names? Opie; Mirizzi; Nyhus

These last names anyone has to speak aloud at least once in his/her carrier to an audience:

P.Mirizzi was seemingly an Italian emigrant to Argentina. What way should be the best choice to read up, the Italian or Spanish?

As for Dr.E.Opie (the Opie syndrome, the acute pancreatitis due to a stone incarcerated in the Vater's papilla) he might being of varies nations, etc.