Pope John Paul II had several books written under his secular name Karol Wojtyła, although they’re mostly sold under “Pope John Paul II” or “Pope Saint John Paul II” now. What would the proper artist name for him be and how should these alternate titles be handled? Should the main name be the full Latin “Sanctus Ioannes Paulus II” or the more internationally famous “Pope John Paul II” or his native Polish “Papież Jan Paweł II”?
I’d go with the most popular (or most used) name, here “Pope John Paul II”. If in doubt, I take the one used in Wikipedia.