Scandinavia

Scandinavia was a region of Earth located in northern Europe and bordering the North Sea. It included the nations of Norway, Sweden and Denmark.

Going by his kilt, Zoe Heriot initially mistook Scotsman Jamie McCrimmon as being of Scandinavian origin, possibly Danish. (TV: The Wheel in Space)

The Second Doctor, Jamie and Zoe visited Scandinavia some time in the 8th century. When Zoe asked if it was the time of the Vikings, the Doctor replied that it was some time before then. (PROSE: That Which Went Away)

In the 9th century, Nisrin, a Scandinavian, lived as a slave in Dunqulah. (AUDIO: The Destroyer of Delights)

Charles Cranleigh asked if the name Adric was Scandinavian, to which the Fifth Doctor replied "not quite". (TV: Black Orchid)