Thorsteinsson
Thorsteinsson and Thorsteinsen are patronymic surname of Scandinavian origin, meaning son of Thorsteinn. The names may refer to:
Thorsteinsson
- Björn Thorsteinsson, Icelandic chess master
- Raymond Thorsteinsson, Canadian geologist of the Arctic regions
- Steingrímur Thorsteinsson, Icelandic poet, author, and translator
- Thorbjorn Thorsteinsson, Orcadian pirate
Thorsteinsen
- Cecilie Thorsteinsen, Norwegian team handball player