Magog was the 5th child of Japheth [Family].

Gen 10:2 The sons of Japheth; Gomer, and Magog, and Madai, and Javan, and Tubal, and Meshech, and Tiras. Gen 10:3 And the sons of Gomer; Ashkenaz, and Riphath, and Togarmah. Gen 10:4 And the sons of Javan; Elishah, and Tarshish, Kittim, and Dodanim. Gen 10:5 By these were the isles of the Gentiles divided in their lands; every one after his tongue, after their families, in their nations.

No children listed.