Frey

Bu kavram başka kaynaklarda da geçiyor

• British Encyclopedia (1933)
• Everybody's Encyelopedia (1912)
• A Biographical Dictionary of Freethinkers of All Ages and Nations (1889)
• Zell's Condensed Dictionary (1879)
• Freyr — Nuttall Encyclopedia (1907)
• Freyr — The Century Cyclopedia of Names (1904)
• Freyr — 1000 Mythological Characters Briefly Described (1894)