Thorsteinsson and Thorsteinsen are

patronymic A patronymic, or patronym, is a component of a personal name based on the given name of one's father, grandfather (avonymic), or an earlier male ancestor. Patronymics are still in use, including mandatory use, in many countries worldwide, alt ...

surname In some cultures, a surname, family name, or last name is the portion of one's personal name that indicates one's family, tribe or community. Practices vary by culture. The family name may be placed at either the start of a person's full name ...

of Scandinavian origin, meaning ''son of Thorsteinn''. The names may refer to:

Thorsteinsson

* Björn Thorsteinsson (born 1940), Icelandic chess master *

Raymond Thorsteinsson Raymond Thorsteinsson, (January 21, 1921 – April 23, 2012) was a Canadian geologist who focused on the geology of the high Arctic. He was a Fellow of The Arctic Institute of North America, primarily known for his contribution to the geo ...

, Canadian geologist of the Arctic regions *

Steingrímur Thorsteinsson Steingrímur Thorsteinsson (1831–1913) was an Icelandic poet and writer. He translated many works of literature into Icelandic, including ''Arabian Nights'' and the fairy tales of Hans Christian Andersen Hans Christian Andersen ( , ; 2 ...

(1831–1913), Icelandic poet, author, and translator *

Thorbjorn Thorsteinsson Thorbjorn Thorsteinsson (Old Norse: Þórbjörn klerkr Þórsteinnson), also known as Thorbjorn the Clerk, was a pirate from the Orkney Islands who was executed in 1158. Thorbjorn was married to the sister of Sweyn Asleifsson, but they first qu ...

(d. 1158), Orcadian (of Orkney) pirate

Thorsteinsen

Cecilie Thorsteinsen Cecilie Thorsteinsen is a Norwegian team handball player. Thorsteinsen made her debut on the national team in 1994. She played 22 matches and scored 50 goals for the national team from 1994 to 2001. She played for the national team at the 2000 E ...

, Norwegian team handball player {{surname Patronymic surnames