40%RatingSave Gender Masculine Usage Old Norse [1][2] Meaning & History From the Old Norse elements fastr "firm, solid" and ulfr "wolf". Related Names Rootsfastr + ulfr Categories animals, canines, strength, wolf Sources & References Viking Answer Lady Webpage, available from https://www.vikinganswerlady.com/ONNames.shtml. Peterson, Lena. Nordiskt runnamnslexikon. Uppsala, 2007, page 62.
