Background
She was born in Kristiania, the second of five children of Gabriel Gabrielsen Holtsmark (1867–1954) and Margrete Weisse (1871–1933), and grew up in Kristiania and Åson She was a maternal granddaughter of Johan Peter Weisse, a paternal granddaughter of Bent Holtsmark, a niece of Bernt and Torger Holtsmark, and a sister of Johan and Karen Holtsmark.
Education
Holtsmark was educated in business schools and worked at the Christiania Sparebank from 1913 to 1915 before taking the examen artium at Kristiania Cathedral School in 1917. In 1927, she graduated from the Royal Frederick University with a candidate.philol.
Career
Degree in 1924. She majored in Norwegian and minored in French and history, and also worked part-time as a tutor and keeping accounts at the Oslo Commerce School, where her father was the director Holtsmark became the first female professor in Old Norse at the University of Oslo. She worked at the University Library of Oslo until 1930, except for 1925-1926, when she was a docent in Norwegian at the University of Hamburg for a year.
In 1931 she was hired as a docent in Norse philology at the University.
She took the dr.philos. degree in 1936 with the thesis En islandsk scholasticus fra det 12. århundre, and in 1949 was promoted to professor, succeeding Magnus Olsen. She had to retire in 1960 because of multiple sclerosis, which confined her to a wheelchair from the 1950s onwards.
She died in Oslo in May 1974.
Membership
Norwegian Academy of Science and Letters]
Member of the Norwegian Academy of Science and Letters (from 1941).