Þórsteinn is the Old Norse original form of the Scandinavian name Torsten. The name is a compound of the theonym Þórr (the Norse god of thunder, storms, and strength) and steinn, meaning "stone", thus giving the overall meaning "Thor's stone". This name belongs to a group of Old Norse names invoking the god Thor, such as Þórarin, Þórhall, Þórkell, and Þórfinnr, many of which have not survived as common given names today.EtymologyThe first element of Þórsteinn derives from Proto-Germanic *Þunraz, meaning "thunder", reflecting Thor's role as a thunder god. In Norse mythology, Thor is depicted as a red-bearded, short-tempered deity armed with the hammer Mjölnir, an enchanted belt Megingjörð, and destined to slay the serpent Jörmungandr at Ragnarök but succumb to its venom. The second element, steinn, means "stone" in Old Norse, making the name a kenning or poetic compound akin to a amulet or symbol of Thor's power.Historical and Literary AttestationsÞórsteinn is well-attested in medieval Icelandic sources. Notable historical figures include Þorsteinn rauður Ólafsson (c. 850–880), a Viking chieftain, and Þórsteinn Eiríksson (late 10th century), a relative of Leif Erikson. The name also appears in Icelandic sagas such as Draumr Þorsteins Síðu-Hallssonar. In England, the Old English equivalent Thurstan emerged after the Norman Conquest, referring to an 11th-century Archbishop of York. The name spread throughout Scandinavia and subsequently to German-speaking regions, giving rise to modern variants.Modern Variants and Cultural SignificanceToday, Þórsteinn and its derivatives are used in several Germanic language areas: Torsten in Swedish, Thorsten in Swedish, Thorstein in Norwegian, and Þorsteinn in Icelandic. The Finnish form is Torsti. While popularity has waned in some regions, the name retains a connection to Norse heritage and mythology.Meaning: "Thor's stone"Origin: Old NorseType: First nameUsage: Historical Norse, modern in ScandinaviaRoot: Thor and steinn