Gotland, Guthland, Gutland

Gutland (meaning 'Good country') is a region covering parts of the Grand Duchy of Luxembourg.

It was a part of Arthur's empire. It's king, Doldavius, surrendered to Arthur rather than be conquered.

The king later participated in Arthur's wars against France, Rome, and Mordred.

There is also an island southeast of Sweden which is called Gotland.

See also
Jutland | The Legend of King Arthur