Þórfastr is an Old Norse masculine given name, combining the name of the thunder god Thor with the element fastr meaning "firm, solid" or "steadfast." The name thus conveys the sense of "Thor's firmness" or "steadfast as Thor."
Etymology and Linguistic Roots
The first element derives from Þórr, the Old Norse name of the thunder god, ultimately from Proto-Germanic *Þunraz, meaning "thunder." In Norse mythology, Thor is the son of Odin, known for his red beard, immense strength, and wielding the hammer Mjölnir. The second element fastr appears in several compound names such as Ólafr (ancestral form of Olaf) and Sigfastr, reinforcing a theme of reliability and strength.
Cultural Context and Usage
Þórfastr belongs to a class of Thor-compounded names that express devotion or dedication to the god, similar to Þórsteinn (Thor's stone) or Þórvaldr (Thor's ruler). These names were especially popular in Iceland and Scandinavia during the Viking Age and into the medieval period. While the name is rare today outside scholarly or revivalist contexts, a notable bearer was the 14th-century Icelander Þórfastr Rögnvaldsson, mentioned in Landnámabók, a medieval Icelandic book of settlers. Like many Old Norse names, Þórfastr did not survive into modern Scandinavian naming traditions except in reconstructed or artistic usage.
Notable Bearers
Historical records include a Þórfastr blávíssi (blávíssi meaning "blue-wise" or perhaps a byname according to Landnámabók), who settled in the Eyjafjörður region of Iceland. Another figure, Þórfastr Jónsson, appears in medieval charters as a chieftain. These individuals highlight the name's presence among the Norse settler elite.
Related Forms and Variants
A diminutive form of the name is Tófi, which may also derive from Thor. In Danish, a cognate may be Tue (likely a short form of Thor-related names). The name 'Þórfastr' preserves the archaic compound structure, while variants like Þórfast and Thorfastrus appear in Latinized records.
- Meaning: "Firm through Thor" or "Thor's steadfast"
- Origin: Old Norse
- Type: Compound given name
- Usage Regions: Iceland, Scandinavia (medieval period)