Iduna and Agnarr, the Etymology

Agnarr

Everyone seems to agree on Agnarr, which is an ancient Scandinavian name that can be derived either from “agi” meaning “awe, terror” or “egg” meaning “edge of a sword”, and combined with “warrior”.

This makes Agnarr from Frozen 2 either “Terror Warrior” or “Sword Edge Warrior”, which may or may not be something of a spoiler.

Iduna

I have mentioned Iduna’s etymology before, but I return with more information: languages conflict, with the meaning “the rejuvenating one” falling in line with her role in Norse mythology as the sole keeper of apples that grant the gods their eternal youth. But the name is in use in Danish, Dutch, Norwegian and Swedish-speaking countries, where its meaning varies from “to rejuvenate nature” to “the loving one”.

Both names come from characters with roles in Northern Mythology, where Agnarr Geirröðsson aids a disguised Odin in his escape from torture being inflicted by Geirrǫðr, Agnarr’s father(!), while Norse Goddess Iðunn is tricked by Loki into being kidnapped by a giant, causing the gods to lose their eternal youth until Loki frees her.