John Gill Commentary 1 Chronicles 1:5

"The sons of Japheth: Gomer, and Magog, and Madai, and Javan, and Tubal, and Meshech, and Tiras." — 1 Chronicles 1:5 (ASV)

Ver. 5-27. The sons of Japheth, Gomer

Here begins the genealogy of the sons of Noah after the flood; of the sons of Japheth the elder, in this and the two following verses; next of the sons of Ham, the younger brother, (1 Chronicles 1:8–16) , then of Shem, whose posterity are mentioned last, because from him, in the line of Heber, sprang Abraham, the ancestor of the Jewish nation, of whom the Messiah was to come, for whose sake this genealogy is given, (1 Chronicles 1:17–27) . The whole is the same with the account in (Genesis 10:1–11:29)