This Mjolnir, or Thor’s Hammer, is an ancient Norse symbol, a stylized representation of the legendary magical weapon of the Norse God Thor. “Mjolnir” means “lightning,” and symbolized the God’s power over Thunder and Lightning. The Hammer Mjolnir was said to always return after it had been thrown.
The Thor’s Hammer amulet was worn frequently by believers as a symbol of protection- a practice so popular it continued even after most of the Norse population had converted to Christianity. In modern times, is often used as an emblem of recognition for members of the Asatru faith, and as a symbol of Norse heritage.
A later form of the Mjolnir is called the Wolf’s Cross, or Dragon’s Cross, and was associated with early Norse Christianity: