Thorfinnsson

Thorfinnsson is an Icelandic patronymic surname. Notable people with the surname include:


 * Björn Thorfinnsson (born 1979), Icelandic chess player and journalist
 * Bragi Þorfinnsson (born 1981), Icelandic chess grandmaster
 * Paul and Erlend Thorfinnsson; Paul (died after 1098) and Erlend (died 1098) ruled together as Earls of Orkney
 * Snorri Thorfinnsson (born between 1005 and 1013), the first European to be born in North America