In Norse mythology, Útgarða-Loki is the ruler of the castle Útgarðr in Jötunheimr. He is one of the jötnar and his name means literally "Loki of the Outyards" or "Loki of the Outlands", to distinguish
[The] Giant Skrymir and Thor (c. 1891), by Louis Huard [fr].
"I am the giant Skrymir" (1902) by Elmer Boyd Smith.
Thor issues blows to the sleeping Skrýmir while the group looks on in an illustration (1842) by Friedrich Ludwig von Maydell [de].
Thorkil in Utgarthilocus' chamber, illustration by Louis Moe (1898)
In Norse mythology, Þjálfi and Röskva, also known as Thjalfi and Roskva, are two siblings, a boy and a girl, respectively, who are servants of the god Thor. Þjálfi receives a single mention in the Poe
Útgarða-Loki
…In the Prose Edda book Gylfaginning (chapter 44), the enthroned figure of Third reluctantly relates a tale in which Thor, Loki and Thor's servants, Þjálfi and Röskva are traveling to the east. They arrive at a vast forest in Jötunheimr, and they continue through the woods until dark. The four seek shelter for the…
Ingvar runestone U 778 with the personal name Þialfi.
Thor, Loki, Þjálfi, and Röskva ride in Thor's goat-driven chariot in an illustration by Mårten Eskil Winge from an 1893 edition of the Poetic Edda.