He was the most senior retainer (Dienstmann) of an Amt; the administrative office of a territorial lord (Landesherr) created to manage the estates of manors (Gutshöfe), castles and villages.
He resided in an Amthaus or Amtshaus and collected taxes from the district (Amtsbezirk), administered justice and maintained law and order with a small, armed unit.
By contrast, the Icelandic word ambátt, "female slave" and the Norwegian ambått "room maid", "maiden", emerged from the Celtic-Latin via Old German/Old Nordic.
In Switzerland the Ammann (Amtmann) was an office, since the Middle Ages, elected by the citizens who was the leader of the executive of a canton (Landammann), a town (Stadtammann) or a parish (Gemeindeammann).
Originally the introduction of official titles such as Justizamtfrau was started in the 1970s by a Lower Saxon female official/law enforcement officer who refused her posting order as long as it was not made out in the feminine form.