From BiblePortal Wikipedia

People's Dictionary of the Bible [1]

Greeks, Grecians . The "Greeks" were those Greeks by race,  Acts 16:1;  Acts 16:3;  Acts 18:17 A. V., but the R. V. omits "the Greeks" and reads "they all;" or else Gentiles as opposed to Jews,  Romans 2:9-10, "Gentile" A. V., but the margin of the A. V. and the text of the R. V. read "Greek." But Grecians were foreign Jews as distinct from those in Palestine, who were called "Hebrews."  Acts 11:20. The Greeks and Hebrews first met when the Tyrians sold the Jews to the Greeks.  Joel 3:6. "Prophetical notice of Greece occurs in  Daniel 8:21, etc., where the history of Alexander and his successors is rapidly sketched.  Zechariah 9:13 foretells the triumphs of the Maccabees over the Græco-Syrian empire, while Isaiah looks forward to the conversion of the Greeks, amongst other Gentiles, through the instrumentality of Jewish missionaries.  Isaiah 66:19."

Baker's Evangelical Dictionary of Biblical Theology [2]

See The Nations

Fausset's Bible Dictionary [3]

(See Grecians .)