So yotun is clearly jötunn, as in a Norse giant, but what the heck is "foglooneel"?
Edit:
So far, the closest I can come up with name-wise is Hrungnir, one of the Norse giants. Appearance-wise, it doesn't make sense unless the author took a random giant name and slapped it on a creature of their own design (entirely possible).
For the appearance, the Eikþyrnir is a good match, but there isn't any connection in the name except the -nir ending.
Thematically, I can see it as Hófvarpnir, which is supposed to be a horse, but specifically Hel's horse, and "Ruler of the Skewered Frost Corpses" kind of makes sense for a creature that lives in Niflheim. I can see the beginning and ending of the name kind of matching, but not the middle.