Hi, I also have Nygrens in my tree, I have no idea where in Sweden they are from. I have Gust Adolph Nygren born 1898, lived in LA somewhere, then in Kingsburg, (Fresno County) California. He married Stella Johnson and had two children, Glyn and Lloyd. I have a photo of him with a brother and his sisters and mother, on the back it says, Al, Iris, Esther, Unknown, Gust and Lola. I am waiting for his death (1969) and marriage certificates to see if they will give me any other information. I also found on the California Death Record on Roots Web a listing for a Gustaf Nygren d. 1923 in California. If anything helps or you find any Nygrens that are not yours please let me know. Thanks!