Wikipedia
Ioudaios (; pl. Ioudaioi) is a Greek ethnonym used in classical and biblical literature which commonly translates to " Jew" or " Judean". In its various meanings, the word has also been translated as "Judahites", "people of the region of Judah/Judea" (Greek: ) and "leaders of Judea".
The choice of translation is the subject of frequent scholarly debate, given its central importance to passages in the Bible (both the Hebrew Bible and the New Testament) as well as works of other writers such as Josephus and Philo. Translating it as Jews is seen to infer connotations as to the religious beliefs of the people, whereas translating it as Judeans confines the identity within the geopolitical boundaries of Judea.
A related translation debate refers to the terms (verb), literally translated as Judaizing, and (noun), controversially translated as Judaism or Judeanism.