The sons of Gomer: Ashkenaz, Riphath, and Togarmah.
Moses begins with Japheth's family, either because he was the eldest, or because his family lay remotest from Israel and had least concern with them at the time when Moses wrote, and therefore he mentions that race very briefly, hastening to give an account of the posterity of Ham, who were Israel's enemies and of Shem, who were Israel's ancestors; for it is the church...
Commenting on Genesis 10:1-5
And the sons of Gomer,.... Who was the first of the sons of Japheth, three of whose sons are mentioned, and they are as follow: Ashkenaz, and Riphath, and Togarmah; the first of these seated himself in the lesser Asia, in Pontus and Bithynia, where were some traces of his name in the river Ascanius, and in the Ascanian lake or bay; and also in...
Ashkenaz - Probably gave his name to Sacagena, a very excellent province of Armenia. Pliny mentions a people called Ascanitici, who dwelt about the Tanais and the Palus Maeotis; and some suppose that from Ashkenaz the Euxine Sea derived its name, but others suppose that from him the Germans derived their origin. Riphath - Or Diphath, the founder of the Paphlagonians, which were anciently called Riphataei.