Edith Wencke Arnesen/Waaroe & Ervin Reidar Arnesen

Seeking help please with above. In 1910 Norwegian census Edith (b 24/12/1900) and Ervin (b 4/12/1903) both born Kristiania are listed as children of Carl Johan Emanuel Arnesen & Barbra Gunhild Jorgensen. Family residing at Akersbakken 30, Kristiania. I also found on Gravminner death records for Edith Wencke Waaroe (death 24/4/1980) and Karl Kristian Waaroe (death 16/12/1979) both buried Var Freslers gravlund, Oslo. Ancestry also has passenger lists for a Wencke Waaroe and Karl Waaroe (various spellings) into New York, San Francisco and Boston at various times, although I cannot access full details. Help please in finding a marriage which would confirm link of Edith Wencke Arnesen to Karl Kristian Waaroe. Also to find any other details of Edith's brother Ervin Reidar of whom I can find no further trace.