Japheth means in the bible: Noah’s youngest son Moses 8:12, Gen. 6:10, 7:13 and 9:13. Gen. 9;18; 23. His blessing Gen. 9.27. His descendants spread over Europe’s Mediterranean coasts and areas adjacent to the Black and Caspian Seas Gen.10:1-5; 21; 1 Chr. 1:4-5, which formed what we now call the Indo-European family.
(in Bible Dictionary)