Who is the Norse god of thunder?

Thor is a prominent god in Germanic paganism. In Norse mythology, he is a hammer-wielding god associated with thunder, storms, strength, protection, fertility, and farmers. Besides Old Norse Þórr, the deity occurs in Old English as Thunor, in Old Frisian as Thuner, in Old Saxon as Thunar, and in Old High German as Donar, all ultimately stemming from the Proto-Germanic theonym *Þun(a)raz, meaning 'Thunder'.