Thorstein is a Norwegian masculine given name, and may refer to:

• Thorstein Eríksson
  Thorstein Eríksson
  Thorstein Eiriksson was the youngest son of Eiríkr the Red.Leif Ericson's voyage is discussed extensively in Brattahlíð and Thorvald, Leif's brother, thinks that Vínland was not explored enough. Leif offers him his ship for a new voyage there and he accepts. Setting sail with a crew of 30,...
  
  , youngest son of Erik the Red
• Thorstein Helstad
  Thorstein Helstad
  Thorstein Helstad is a Norwegian footballer who plays as a striker for French Ligue 2 club Monaco and the Norwegian national team.- Career :...
  
   (born 1977), Norwegian footballer
• Thorstein Johansen
  Thorstein Johansen
  Thorstein Arthur Johansen was a Norwegian rifle shooter who competed in the early 20th century.He participated in shooting at the 1920 Summer Olympics in Antwerp and won the gold medal in team 100 m running deer, double shots...
  
   (1888-1963), Norwegian rifle shooter
• Thorstein John Ohnstad Fretheim
  Thorstein John Ohnstad Fretheim
  Thorstein John Ohnstad Fretheim was a Norwegian acting councillor of state in the NS government of Vidkun Quisling 1940-1941, and minister 1941-1945. Fretheim was a district veterinary by profession.-References:...
  
   (1886-1971), Norwegian politician
• Thorstein the Red
  Thorstein the Red
  Thorstein the Red or Thorstein Olafsson was a viking chieftain who flourished in late ninth-century Scotland. He was born around 850 AD and was the son of Olaf the White, King of Dublin, and Aud the Deep-minded, who was the daughter of Ketil Flatnose...
  
   (circa 850-880), Viking chieftain
• Thorstein Treholt
  Thorstein Treholt
  Thorstein Treholt was a Norwegian politician for the Labour Party. He was the father of convicted Norwegian spy Arne Treholt.He was born in Skoger....
  
   (1911-1993), Norwegian politician
• Thorstein Veblen
  Thorstein Veblen
  Thorstein Bunde Veblen, born Torsten Bunde Veblen was an American economist and sociologist, and a leader of the so-called institutional economics movement...
  
   (1857-1929), Norwegian-American sociologist and economist

In the form Thurstan

Thurstan

Thurstan or Turstin of Bayeux was a medieval Archbishop of York, the son of a priest. He served kings William II and Henry I of England before his election to the see of York in 1114. Once elected, his consecration was delayed for five years while he fought attempts by the Archbishop of Canterbury...

 it was used in England after the Danish invasions.

Etymology

The Old Norse

Old Norse

Old Norse is a North Germanic language that was spoken by inhabitants of Scandinavia and inhabitants of their overseas settlements during the Viking Age, until about 1300....

 name was Þórsteinn. The name is composed by the words Thor

Thor

In Norse mythology, Thor is a hammer-wielding god associated with thunder, lightning, storms, oak trees, strength, the protection of mankind, and also hallowing, healing, and fertility...

(Scandinavian "Lord of Thunder and War") and sten (Swedish

Swedish language

Swedish is a North Germanic language, spoken by approximately 10 million people, predominantly in Sweden and parts of Finland, especially along its coast and on the Åland islands. It is largely mutually intelligible with Norwegian and Danish...

 for "stone

Rock (geology)

In geology, rock or stone is a naturally occurring solid aggregate of minerals and/or mineraloids.The Earth's outer solid layer, the lithosphere, is made of rock. In general rocks are of three types, namely, igneous, sedimentary, and metamorphic...

"). It can be translated to "Thor's stone," "Thor's hammer" or even "adamant as Thor."