There are multiple origins and translations for the name Thor:
1. Scandinavian (Danish, Swedish and Norwegian) name-giving means - "thunder, lightning".
Thor is a Scandinavian (Þórr) hammer-wielding God associated with thunder, lightning, storms, oak trees, strength, destruction, fertility, healing, and the protection of mankind. The cognate deity in wider Germanic mythology was known in Old English as Þunor and in Old High German Donar.
2. See the name Tor