Apparently True

The Norse God Heimdall Was a Castrated Warrior

In Norse mythology, Heimdall, the all-seeing guardian of the Bifrost Bridge, was said to have been castrated by the trickster god Loki. According to the Poetic Edda, a medieval Icelandic manuscript of Old Norse poetry, Heimdall's testicles were ripped off by Loki, who then threw them into the sea. This bizarre tale is a testament to the rich and often disturbing world of Norse mythology, where gods and goddesses were not above being subjected to grotesque punishments.