Stefansson or Stefánsson is a surname of Icelandic or Swedish origin, meaning son of Stefán. In Icelandic names, the name is not strictly a surname, but a patronymic. The name may refer to: Baldur R. Stefansson (1917–2002), Canadian agricultural scientist; known as the Father of Canola. Davíð Stefánsson (1895–1964), Icelandic poet. Hannes Stefánsson (born 1972), Icelandic chess grandmaster. Hermann Stefánsson (born 1968), Icelandic author. Ívar Stefánsson (1927–2009), Icelandic cross-country skier. Janne Stefansson (born 1935), Swedish Olympic cross-country skier.
https://en.wikipedia.org/wiki/Stefansson