Strong oppose: The correct title, both in French and in English, is Aterix (or Astérix), not Asterix an Obelix. See e.g. this cover on Wikipedia, and all other covers. The series is listed as "The Adventures of Asterix" on Amazon, the official site  only mentions "Asterix albums", etcetera. I have not found any reference that "Asterix an Obelix" is "the proper name", although it is indeed also referenced thus by many: that is why it is a redirect to the official name.