The House of Hahn (originally Hane and Hanen) was an ancient German-Baltic noble family which was prominent in the Duchy of Courland and Semigallia and on the Baltic Island Ösel.

The first Hahn, with whom this coat of arms is associated, is mentioned in the historical annals as Eckhard[2] I, or "Eggehardus Gallus" in Latin original.

Regarded by some researchers [3] as highly improbable on mainly geographical grounds,[3] this theory may warrant further consideration due to close connections between the Obotrit's house of Mecklenburg and that of Franconian Hennebergs.

The marriage in 1229 (a year before Eckhard Hane appears in chronicles) between Johann and Luitgart von Henneberg,[4][better source needed] daughter of Poppo VII.

[7] Von Hahns have distinguished themselves through their service to the sovereigns of the Russian, Holy Roman, and German Empires, kings, and queens of Denmark, Sweden, and Poland.

Mecklenburg: Notable members: Courland: The history of the Baltic Hahns begins with Johann Hane referred to in 1318 as a vassal of the Danish king Erik.

In 1476 Berndt von der Borch, Master of the Order granted Heinrich Hahn the Postenden estate, which remained in the same hands until 1939 - the longest uninterrupted land ownership in Courland.