Boyd’s Bible Dictionary:
Inhabitants of Elam (Ezra 4:9).
Concise Bible Dictionary:
Inhabitants of Elam, some of whom were located in Palestine (Ezra 4:9). Some of the same name, 550 years after, were present at Jerusalem on the day of Pentecost, but these were doubtless Jews from Elam (Acts 2:9).
Jackson’s Dictionary of Scripture Proper Names:
gentilic of Elam