Johann Carsten Eitzen II, Cuxhaven, active 1815 when he took over his father's workshop until his death 1863.
Ref. W. Scheffler,
Goldschmiede Niedersachsens, Halbband 1: Aerzen-Hamburg, p. 281 no. 7.
He can also be found in Theoderich's excellent website "Alte Beschauzeichen deutscher Städte",
http://silberpunze.freehost.ag/index.php