Nethuns

In Etruscan mythology, Nethuns was the god of wells, later expanded to all water, including the sea. The name "Nethuns" is likely cognate with that of the Celtic god Nechtan and the Persian and Vedic gods sharing the name Apam Napat, perhaps all based on the Proto-Indo-European word *népōts "nephew, grandson." In this case, Etruscan may have borrowed the Umbrian name *Nehtuns, (Roman Neptune, who was originally a god of water).

Nethuns is mentioned on the Piacenza liver, a third-century BCE bronze model of a sheep's liver used for the divinatory rites called haruspicy, as Neθ, an abbreviation for his full name. As a patron god his profile, wearing a ketos (sea monster) headdress, appears on a coin of Vetulonia, circa 215 – 211 BCE; he is accompanied by his trident between two dolphins.

NETHUNS is engraved on a bronze Etruscan mirror in the Museo Gregoriano in the Vatican.

...
Wikipedia