The Celtic sky god associated with lightning and thunder, whose hammer caused lightning, is commonly known as Taranis. Taranis is a deity in Celtic mythology, specifically in Gaulish and Brythonic traditions. He is often depicted as a powerful god wielding a hammer or wheel, representing his control over thunderstorms and the sky.
The name Taranis is derived from the Celtic word for "thunder," emphasizing his role as a thunder god. Taranis was believed to be responsible for creating thunder and lightning by striking his hammer or wheel, which would cause storms and bring about the forces of nature.
Although Taranis was primarily worshipped in Gaul (present-day France) and other Celtic regions, evidence of his worship and representation can be found across different Celtic cultures and regions. However, due to limited surviving sources, our understanding of Taranis and his mythology is somewhat fragmented.