Arnold of Altena

Arnold of Altena (* probably before 1150, † May 3, 1206, 1207 or 1209) was Count of Altena and a son of Eberhard I of Berg- Altena.

He left with his brother Archbishop Adolf of Berg- Altena build the Isenburg near Hattingen and had many properties. He is regarded as the founder of Berg Altena - Isenberg line.

His son Friedrich von Isenberg went down in history as the murderer of Archbishop Engelbert I of Cologne. Other sons were the Bishop of Osnabrück Engelbert I of Isenberg and the Bishop of Münster Dietrich III. Isenberg. They were also involved in the murder.

Marriage and issue

Arnold married Matilda, daughter of Florence III. of Holland.

• Dietrich III. Isenberg, Bishop of Münster
• Engelbert I of Isenberg, Bishop of Osnabrück
• Bruno
• Adolf ∞ Matilda of Holte
• Agnes ∞ Christian II, Count of Oldenburg
• Eberhard II
• Phillip
• Friedrich von Isenberg
• Gottfried