The Christian portion of Greece's Slavic-speaking minority are commonly referred to as "Slavophones" (from the Greek Σλαβόφωνοι "Slavophōnoi" — literally "Slavic-speakers") or "Dopii" (which means "locals" in Greek). The vast majority of them espouse a Greek national identity and are bilingual in Greek. They live mostly in the region of Western Macedonia and adhere to the Greek Orthodox Church. The fact that the majority of these people self-identify as Greek makes their number uncertain. The second group is made up of those who seem to reject any national identity (Greek or Slav Macedonian) but have distinct ethnic identity, which they may call "indigenous" (dopia), Slavomacedonian, or Macedonian. The smallest group is made up of those who have a clear Macedonian national identity and consider themselves as part of the same nation that predominates in the neighboring Republic of North Macedonia. A crucial element of that controversy is the very name "Macedonian", as it is also used by a much more numerous group of people with a Greek national identity to indicate their regional identity. Slavic speakers also use the term "Macedonians" or "Slavomacedonians", though in a regional rather than an ethnic sense. Until and including the 1951 census the question of mother tongue was asked throughout Greece, so this gives a rough idea as to the size of this group, and later estimates are usually based on this figure.