Here are some examples. Marlowe writes:
Faustus, these books, thy wit, and our experience
Shall make all nations to canonize us.
As Indian Moors obey their Spanish lords,
So shall the subjects of every element
Be always serviceable to us three.
Like lions shall they guard us when we please,
Like Almain rutters with their horsemen’s staves,
Or Lapland giants, trotting by our sides;
Sometimes like women, or unwedded maids,
Shadowing more beauty in their airy brows
Than in the white breasts of the Queen of Love.
And here is Milton, much later:
Nor uglier follow the night-hag, when, called
In secret, riding through the air she comes,
Lured with the smell of infant blood, to dance
With Lapland witches, while the labouring moon
Eclipses at their charms.
Northern European folklore tended to relegate "distant lands" as homes of giants, dragons, and magic. In England, we often see folktales and legends featuring Wales or Cornwall in this capacity.
In this way, Finland and Lapland were often seen as places where giants live/lived, particularly for Scandinavians, although their reputation for this obviously extended to Britain. Similarly, the Sami people had a widespread reputation for magical practices. One sees these sorts of references more commonly in early Scandinavian literature, but the belief that these people and those places were filled with wonders and magic easily caught on even in England.
Some of the reputation for magic was well-funded: the traditions of the Sami people drew a great deal on eastern cultural practices, and as such, they struck other Northern Europeans as exotic and mysterious. The classic study of Sami magical practices is Louise Bäckman and Åke Hultkrantz, "Studies in Lapp Shamanism" (1978); see also Carl-Martin Edsman, editor, "Studies in Shamanism: Based on Papers read at the Symposium on Shamanism held at Åbo on the 6th-8th of September, 1962" (1967).