Jotun

s or known as The Frost Giants that live in Jotunheim. Laufey (Loki's father) was the ruler of the Giants.

Foot Soldiers
Standard Jotun soldiers come in three classes: Bruisers, Scrappers and Tacticians. Infiltrator Jotun are mostly Spec-Ops exclusive.

Bosses
Jotun first show up as foot soldiers employed by Loki, though they have helped several other enemies of Asgard from time to time. Loki himself is technically a Jotun as he is the son of Laufey. Ymir is the forefather of the Ice Jotun. While Surtur is the oldest of the Jotun(and thus the first of the Fire Jotun). Hela is technically a Jotun as well, although she does not seem to have the abilities of a Fire or Ice Jotun.

Etymology
Jötunn(plural Jötnar), sometimed anglicized as Jotun, is a giant in Norse mythology, a member of a race of nature spirits with superhuman strength, described as standing in opposition to the races of Æsir and Vanir, although they frequently mingled with or were even married to these.