Ahti, also known as Achtes or Ahto, was the Finnish god of the sea and storms.
He was married to married goddess Vellamo, with both of them residing at bottom of sea which is called Ahtola, and resides over lesser creatures of the sea, such as water-spirits and the Iku-Turso. The old pagans of Finland prayed to Ahti for generous catch of fish and good weathers at sea.
He was partially impetuoius and vindictive towards his people, though he was just and loving king to his own folk.
Some old witches also used the name of sea god in their incantations and spells.