Look up Fritiof in Wiktionary, the free dictionary.
Friðþjófur (variations: Fritiof, Frithiof, Fritjof, Frithjof, and Fridtjof) is a Scandinavian masculine given name derived from Old Norse friðr (“peace”) + þjófr (“thief”). Maybe a kenning (a metaphorical phrase used in Old Norse poetry) for a fighter. Bearers of the name include: