Gerhard VI (c. 1367–1404) was the Count of Holstein-Rendsburg from 1382, and Duke of Schleswig as of 1386.Gerhard VI was born around 1367, the son of Count Henry II from the Rendsburg line of the House of Schauenburg and Ingeborg of Mecklenburg. After the death, in 1381 or 1384, of his father, who had ruled jointly with Gerhard's uncle Nicholas (Claus), Gerhard and his younger brother Albert II entered into the joint government for their late father.