In the Celtic mythology
('Insular Brythonic mythology'), Govannon
) was the son of Danu
. He killed his nephew, Dylan
, not knowing who he was. He was a smith god who created magical swords for the Tuatha de Danaan
, along with Credne
. He was also a god of alcohol; his beer gave the drinker immortality.
Alternative: Gofannon, Goibniu (Irish)