Old Norse origin
Source-reportedMeaning: “Thor” + “stone”
Fennicized form of Old Swedish Thorsten (compare Swedish Torsten), ultimately from Old Norse Þorsteinn, from Þórr (“Thor”) + steinn (“stone”). The surname developed from the given name via farm names.
Sources for this account (4)
- Wiktionary: TorstiCC-BY-SA-4.0 · retrieved 2026-10-15
- Greek Wiktionary: TorstiCC-BY-SA-4.0 · retrieved 2026-10-15
- Polish Wiktionary: TorstiCC-BY-SA-4.0 · retrieved 2026-10-14
- Russian Wiktionary: TorstiCC-BY-SA-4.0 · retrieved 2026-10-14

