Who married Gerhard II, Count of Holstein-Plön?

Gerhard II of Holstein-Plön (1254 - 28 October 1312), nicknamed the Blind, was Count of Holstein-Plön from 1290 to 1312.

Gerhard II of Holstein-Plön (1254 - 28 October 1312), nicknamed the Blind, was Count of Holstein-Plön from 1290 to 1312.

Agnes of Brandenburg (c. 1257 – 29 September 1304) was the Queen consort of Denmark and Duchess Regnant of Estonia by marriage to King Eric V of Denmark. As a widow, she served as the regent of Denmark for her son, King Eric VI, during his minority from 1286 until 1293.

She and Eric V had seven children, including Eric VI, Christopher II, and Martha of Denmark. Through her second marriage to Gerhard II of Holstein-Plön she also had a son, John III of Holstein-Plön.