Adolf IV of Berg count of Berg from 1132 until 1160 and of Altena (died after 1161), son of Adolf III of Berg count of Berg and Hövel. He married (1st) Adelheid von Arnsberg, a daughter of Heinrich count von Rietberg; then (2nd) Irmgard (?) von Schwarzenberg, a daughter of Engelbert von Schwarzenberg.

He built the Schloss Altena, and built Altenberg Abbey (1133) where he enters in 1160.

He had issue from his first marriage:

• Adolf V of Berg count of Berg (killed in Damascus 1148), who married Irmgard von Wasserburg, a daughter of Engelbert count von Wasserburg;

and from his second marriage:

• Engelbert I of Berg count of Berg from 1160 until 1189 (born before 1150, died in Brandis an der Donau June 1189); married Margaret of Geldern (born 1157, died 1190?);
• Eberhard IV of Berg, 1st count of Altena (also called Eberhard I von Altena) (born 1140, died 23 January 1180, buried in Altenberg);
• Friedrich II of Berg, Archbishop of Cologne from 1156 until 1158 (born 1140, died in Pavia 15 December 1158);
• Bruno III of Berg, Archbishop of Cologne^[1] and Duke of Westfalia from 1191 till 1193 (died 1193, buried in Altenberg);
• Arnold, Prince-Bishop of Osnabrück from 1173 until 1190 (died a crusader before Akkon, 15 December 1190).

Adolf IV, Count of Berg is named Adolf II, Count of Berg in the Netherlands and in Germany.

• Alberic of Troisfontaines (MGH, Scriptores XXIII).
• Annales Rodenses (MGH, Scriptores, XVI).
• Annalista Saxo (MGH, Scriptores VI).
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• Kluger, “Propter claritatem generis.” – Kraus, Entstehung.
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