Adolf IX of Berg [SEP] father
Adolf IX of Berg
Adolf IX of Berg (also referred to as Adolf VI) (c. 1280 – 3 April 1348) was the eldest son of Henry of Berg, Lord of Windeck and Agnes of the Mark.
In 1308, Adolf succeeded as Count of Berg upon the death of his uncle William I of Berg who had no children. Adolf was an important and loyal supporter of Ludwig IV of Bavaria, helping him since 1314 in the war of succession. As a result of Adolf's 1312 marriage to
Ravensberg, heiress of Berg and Ravensberg (died 13/19 February 1389), daughter of Otto IV, Count of Ravensberg and Margaret of Berg. Margaret's father Otto had no sons so at his death in 1328, the County of Ravensberg went to his brother Bernhard. However, when Bernhard died in 1346 without issue, Margaret became the heir of Ravensberg, her elder sister Hedwig having died in 1336.br 
Then, when Margaret's uncle, Count Adolf IX of Berg, died in 1348 without issue, Margaret also inherited Berg