Aasta from Mandal - Stamford CT - Skerryvore

My father had a cousin, Martin Holm (b. 1883) who was married to a Norwegian lady, Aasta. They lived in New York C and in Stamford CT. For a while they were caretakers of the country residence of some NYC big shot. I do not know his name, but the name of the estate was Skerryvore. Among other assets Aasta and Martin owned some shares in the Swedish American Line, part of which were bequeathed to me. I met A and M both in America and in Sweden. - I believe that Aasta came from Mandal. It would be nice to find any relatives of hers, in Norway (jeg snakker norsk "til husbehov") or in America.