List of Famous people named Thorfinn

Thorfinn Sigurdsson, also known as Thorfinn the Mighty, was an 11th-century Earl of Orkney. He was the youngest of five sons of Earl Sigurd Hlodvirsson and the only one resulting from Sigurd's marriage to a daughter of Malcolm II of Scotland. He ruled alone as earl for about a third of the time that he held the title and jointly with one or more of his brothers or with his nephew Rögnvald Brusason for the remainder. Thorfinn married Ingibiorg Finnsdottir, daughter of Finn Arnesson, Jarl of Halland.

Thorfinn Torf-Einarsson also known as Thorfinn Skull-splitter was a 10th-century Earl of Orkney. He appears in the Orkneyinga saga and briefly in St Olaf's Saga, as incorporated into the Heimskringla. These stories were first written down in Iceland in the early 13th century and much of the information they contain is "hard to corroborate".

Thorfinn Karlsefni was an Icelandic explorer. Around the year 1010 AD, he followed Leif Eriksson's route to Vinland, in a short-lived attempt to establish a permanent settlement there with his wife Guðríður Víðförla Þorbjarnardóttir and their followers.