Fridrik Sigurdsson or Friðrik Sigurðsson (c1811 – 12 January 1830) was an Icelandic murderer, the last person to be executed in Iceland, along with Agnes Magnúsdóttir, for the murder of Natan Ketilsson, a farmer at Illugastaštir, and Pétur Jónsson from Geitaskarð on 14 March 1828.
[1][2] On the evening of March 13, 1828, Friðrik came to Illugastaður and had the two maids, Agnes and Sigríði, hide in a barn until Natan and Pétur Jónsson, who was a night visitor to the farm, were asleep.
It is not known whether Sigríður took part in the murder itself, but before Friðrik and Agnes set the baðstofa on fire, she stole what was considered valuable.
On the night of March 14, local people woke up in the town of Stapakoti in Vatnsneswhen Agnes was there with the news.
She said that Illugastaðir was engulfed in light flames and that the owner of the farm, Natan, was burned inside together with Pétur Jónsson.