No idea about Vikings, but it was fascinating to read that archaeologists had uncovered suggestions that Galli made it to Britain in later Roman times.
www.britannica.com/topic/Galli-ancient-priests
Galli, singular Gallus, priests, often temple attendants or wandering mendicants, of the ancient Asiatic deity, the Great Mother of the Gods, known as Cybele, or Agdistis, in Greek and Latin literature. The Galli were eunuchs attired in female garb, with long hair fragrant with ointment. Together with priestesses, they celebrated the Great Mother’s rites with wild music and dancing until their frenzied excitement found its culmination in self-scourging, self-laceration, or exhaustion. Self-emasculation by candidates for the priesthood sometimes accompanied this delirium of worship.
news.bbc.co.uk/2/hi/uk_news/england/1999734.stm
Archaeologists in North Yorkshire have discovered the skeleton of a cross-dressing eunuch dating back to the 4th Century AD.