Context : Nils Dardel (full name Nils Elias Kristofer von Dardel, sometimes known as Nils de Dardel) was a 20th-century Swedish Post-Impressionist painter, grandson to famous Swedish painter Fritz von Dardel. 
Subject : Nils Dardel 
Relation : spouse
What is Nils Dardel's spouse's name?