When Johan Fredrik Carlsson was born on 20 May 1875, in Agunnaryd, Kronoberg, Sweden, his father, Carl Johan Eriksson, was 65 and his mother, Christina Svensdr, was 40. He married Jenny Maria Andersdotter on 12 May 1903, in Hamneda, Kronoberg, Sweden. They were the parents of at least 2 sons and 2 daughters. He died on 16 November 1960, in Nöttja, Kronoberg, Sweden, at the age of 85.