Hello, Angie . . . hmmm, to my knowledge, Gustaf Adolf Nilsson (Jonsson), b. 29 Feb 1864, Urist, Sweden, did not have son named Karl Martin. His son John Gustaf Nilsson (Jonsson) was born 15 May 1891 in Linköping. He came to America in 1911 and apparently lived with his uncle Fred Engberg (Nils Fredrik Andersson) in St. Paul, MN. It doesn't sound like the same family to me?