Lensmann

Lensmann in modern Norwegian or lensmand in Danish and older Norwegian spelling (lit. "fief man"; Old Norwegian: "lénsmaðr") is a term with several distinct meanings in Scandinavian history. The Icelandic equivalent was a "hreppstjóri".
Fief-holder.
The term "lensmann" traditionally referred to a holder of a royal fief in Denmark and Norway. As the fiefs were renamed "amt" in 1662, the term "lensmand" was replaced with "amtmand". In Norway these offices evolved into the modern fylkesmann office. Modern Norwegian historians often use the term "lensherre" (English: "fief lord") instead of "lensmann", although from the legal point of view, the king was the fief lord, and the title used by contemporaries was "lensmand", not "lensherre".
While the "lensmann" was a fief-holder from the nobility, the "amtmann" was a civil servant who might be ennobled as a reward.
Modern police officer.
The title "lensmann" is also used in an entirely different meaning in modern Norway, denoting the leader of a rural police district known as a "lensmannsdistrikt".