Jeremiah 25:22 - Ellicott's Commentary On The Whole Bible

The isles which are beyond the sea. — Better, island. The Hebrew word is in the singular, and is properly, as in the margin, a “region by the sea-side” — a “coast-land,” and thus wider in its extent than our “island.” Here the position in which it occurs tends to identify it either with Cyprus or the coast of Cilicia, or Phœnician colonies generally in the Mediterranean. Cyprus seems the most probable of these.