Gudridur was born 26 April 1858 in Vestmannaeyjar; her parents are Ulfur ___ and Valgerdur Jonsdottir, born 20 August 1832, died 7 October 1897. Gudridur married Markus Vigfusson, born 25 December 1851 in Kobenhavn, Denmark. He is the son of Vigfus Jonsson, formadur at Holshus, Vestmannaeyjar, born 6 October 1822 at Rimakoti, Vestmannaeyjar, died in April 1867; and Margret Skuladottir, born 11 November 1824 in Kornholl, Vestmannaeyjar, died 16 October 1859 at Holshus, Vestmannaeyjar.
Gudridur was baptized by Elder Einar Eiriksson 13 April 1886. Also baptized on the same date were Markus Vigfusson and Gudridur’s mother Valgerdur Jonsdottir.
Gudridur and Markus had three children: Margret Jonina 1879-1925, Sigridur Ingibjorg, born 21 July 1883 and Valdimar Einar 1885-1886. Markus and Gudridur and their three children and Gudridur’s mother Valgergur immigrated to Utah in 1886. Their baby Valdimar died two days before their arrival.
Markus worked on the railroad, as a farmer and at the Utah-Idaho Sugar Company factory. He and Gudridur became the parents of eight more children. Gudridur died 8 December 1933 and is buried in the Spanish Fork City Cemetery. In Utah she was known as Gudridur W, Johnson and Gudridur Wolfsdottir.