Sigfús Blöndal (2 November 1874 – 19 March 1950)[1] was an Icelandic linguist, language author, and a librarian at the Royal Library in Copenhagen, best known for Íslensk-dönsk orðabók (Icelandic-Danish dictionary), which he wrote with his wife, Björg Þorláksdóttir Blöndal, and a small team of scholars, whose names appear on the title page.
It took nearly 20 years for the couple along with other scholars to compile the dictionary, which was first published in 1920–1924.
A supplement was published in 1963 by the editors Halldór Halldórsson and Jakob Benediktsson.
Blöndal taught Modern Icelandic at the University of Copenhagen from 1931 to 1946.
[2] His English-language book on the Varangians became the standard work among historians on the subject.