sign - a banner on a high place, to indicate the place of meeting for the dispersed Jewish exiles, preparatory to their return to their land (Isa 5:26; Isa 11:12; Isa 62:10).
those that escape of them - the Gentile survivors spared by God (see on Isa 66:18; Zec 14:16). Isa 2:2, Isa 2:3; Mic 5:7; and Zec 14:16-19 represent it, not that the Jews go as missionaries to the Gentiles, but that the Gentiles come up to Jerusalem to learn the Lord’s ways there.
Tarshish - Tartessus in Spain, in the west.
Pul - east and north of Africa: probably the same as Philoe, an island in the Nile, called by the Egyptians Pilak, that is, the border country, being between Egypt and Ethiopia [Bochart].
Lud - the Libyans of Africa (Gen 10:13), Ludim being son of Mizraim (Egypt): an Ethiopian people famous as bowmen (Jer 46:9): employed as mercenaries by Tyre and Egypt (Eze 27:10; Eze 30:5).
Tubal - Tibarenians, in Asia Minor, south of the Caucasus, between the Black Sea and Araxes. Or, the Iberians [Josephus]. Italy [Jerome].
Javan - the Greeks; called Ionians, including all the descendants of Javan, both in Greece and in Asia Minor (Gen 10:2-4).