Þorsteinsson
Þorsteinsson is a surname of Icelandic origin, meaning son of Þorsteinn. In Icelandic names, the name is not strictly a surname, but a patronymic. The name may refer to:
- Indriði G. Þorsteinsson, Icelandic novelist and short-story writer
- Jón Dagur Þorsteinsson, Icelandic footballer
- Klængur Þorsteinsson, Icelandic Roman Catholic clergyman; bishop of Iceland 1152–76
- Magnús Þorsteinsson, Icelandic businessman; chairman and boardmember of several large businesses
- Pétur Þorsteinsson, Icelandic priest and neologist; leader of an Icelandic language movement
- Skúli Þórsteinsson, Icelandic poet and warrior
- Þorsteinn Þorsteinsson, Icelandic economist and Esperantist
- Þorsteinn Þorsteinsson (athlete), Icelandic athlete who competed in the 800 metres
- Þorsteinn Þorsteinsson (footballer), Icelandic footballer