I call this blade “Ragnar Lodbrok” after the legendary Norse ruler and hero from the Viking Age described in Old Norse poetry and several sagas.
This blade has been forged from an old farriers file.
Ragnar Lodbrok is now being portrayed on the History channels television show “Vikings.”
This knife and other unique items are for sale at http://www.olsonironworks.com
Jeff Olson 
Just came back from Norway and was tempted to bring back a ton of Viking memorabilia. I opted for a sheep skin blanket, but still inspired by it all.
I too love the Viking era artifacts.
Love it. Is that a horseshoe rasp?? I love forging Norse knives over almost anything! 🙂 Great work
It is a horseshoe rasp. Thanks for the kind words.