Farbauti

Farbauti ("Awful Thug"), a giant.
He was the father of Loki and Byleipt and husband of the giantess Laufey.

Snorri calls him father of Loki, Byleipt and Helblindi (which was a name of Loki's fosterfather and blood-brother Odin).

It was said that Loki was born when his mother Laufey was strucked by a lightning, threwn by her husband Farbauti.

His name was mentioned in the Prose Edda and only in connection with his son Loki.