When Jens Peter Gundersen was born on 14 October 1830, in Oslo, Norway, his father, Gunder Johnsen Saktmoe, was 25 and his mother, Marthe Torchelsdatter, was 22. He married Carolina Peterson about 1850, in Oslo, Norway. They were the parents of at least 3 sons and 2 daughters. He died before 1925.
Some characteristic forenames: Scandinavian Erik, Alf, Knut, Anders, Astrid, Bjorn, Fredrik, Gudrun, Helmer, Hilmar, Hilmer, Johan.
Norwegian and Danish: patronymic from the personal name Gunder, from Old Norse Gunnarr, a compound of gunn ‘battle’ + arr ‘warrior’. Compare Gunderson and Gunnerson .