Background
She was born in Kristiania, the daughter of colonel Birger Fredrik Sinding-Larsen (1867–1941) and Emilie Rustad (1871–1904). She was a paternal granddaughter of jurist and writer Alfred Sinding-Larsen, niece of physician Christian Magnus Sinding-Larsen, architect Holger Sinding-Larsen and painter Kristofer Sinding-Larsen, first cousin of architect Knut Martens Sinding-Larsen and journalist Henning Sinding-Larsen, third cousin of statistician Thomas Sinding and grandniece of architect Balthazar Lange.