Gawjam means Gau or in enlish translated region or still better district of...(inlude the name of the people/nation).
You have to know that during the timeframe EB displays there were no germanic cities. Germanics found it unpleasant to live in crowded areas.
At the turning poit in history some "cities" developed though, especially the Chattii (Hattoz) and the Ubii began to live together in great numbers.
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