Gotthard Kettler
Gotthard von Kettler (also Ketteler, German: Gotthard Kettler, Herzog von Kurland; 2 February 1517, near Anröchte, Kreis Soest – 17 May 1587, Mitau) was the last Master of the Livonian Order and the first Duke of Courland and Semigallia.
Read more about Gotthard Kettler: Biography