Thorsteinsson

Thorsteinsson and Thorsteinsen are patronymic surname of Scandinavian origin, meaning son of Thorsteinn. The names may refer to:

Thorsteinsson

 * Björn Thorsteinsson (born 1940), Icelandic chess master
 * Raymond Thorsteinsson, Canadian geologist of the Arctic regions
 * Steingrímur Thorsteinsson (1831–1913), Icelandic poet, author, and translator
 * Thorbjorn Thorsteinsson (died 1158), Orcadian (of Orkney) pirate

Thorsteinsen

 * Cecilie Thorsteinsen, Norwegian team handball player