Per died in 1909 on East 38th Street in New York City. He left his wife and a young daughter, Ruth, born in 1906. His widow remarried another Swedish tailor living on the same street who had also lost his wife the same year. His name was Per Ahlfors and had several children. They all moved to Toledo, Ohio. Ruth Nelson ("Americanized" from Nilsson) was adopted by Per Ahlfors but kept her birth name. She died in 1974 unmarried with no children. I am in touch with the living Ahlfors descendants.