Knives of the Avenger
I coltelli del vendicatore (original)
A knife throwing Viking warrior protects a young peasant woman and her son from an evil man seeking to become king.
Starring Cameron Mitchell, Fausto Tozzi, Elissa Pichelli, Luciano Pollentin, Giacomo Rossi Stuart, Amedeo Trilli, Renato Terra, Sergio Cortona, Goffredo Unger
Watch "Knives of the Avenger" on Tubi TV released in 1966. It's a action & adventure and action movie, and has a rating of 5.6 out of 10 from Imdb which is fairly okay for this kind of movie, and is currently available to watch for free.