Born in Ålesund, he was a great-grandson of a Jens Landmark (1772–1811), brother of Andreas (1769–1839) and Nils Landmark (1775–1859) and uncle of Jens Landmark (1811–1880).
National Historic Landmark | Jens Stoltenberg | Jens-Peter Herold | Jens Galschiøt | Jens Frahm | Jens Voigt | Jens Eriksen | Jens Ulltveit-Moe | Jens Munk | Jens Mouris | Jens Lehmann | Jens Juel | Jens Christian Grøndahl | National Natural Landmark | Landmark Cases in Family Law | Jens Staubrand | Jens Peter Jacobsen | Jens Johansson | Walter Jens | Landmark Theatres | Landmark Legal Foundation | Landmark Cases in Equity | Landmark Bookstores | Jens Olsen's World Clock | Jens Lindemann | Jens Lekman | Jens Knippschild | Jens Juel (diplomat) | Jens Jensen (landscape architect) | Jens Jensen |