Jamieson, Fausset and Brown on Revelation 20:8

8. Gog and Magog--(Eze 38:1-39:29; see on Eze 38:2). Magog is a general name for northern nations of Japheth's posterity, whose ideal head is Gog (Ge 10:2). A has but one Greek article to "Gog and Magog," whereby the two, namely, the prince and the people, are marked as having the closest connection. B reads the second article before Magog wrongly. Hiller [Onomasticon] explains both words as signifying "lofty," "elevated." For "quarters" the Greek is "corners."

to battle--Greek, "to the war," in A and B. But Andreas omits "the."