Arnold of Altena

Arnold of Altena, count of Altena, count of Isenberg and Hövel, Vogt of Werden (1166–1209) was a son of Eberhard IV of Berg.

He inherited the north-western territorium of Altena, and became 1st count of Isenberg in 1200.

He married Mathilde countess of Cleve daughter of Dietrich III, Count of Cleves and Adelaide of Sulzbach (+12.2.1189).

Mathilde's brother was count Diederick IV of Cleve (+1193) who married in 1182 Mechteld (Margaret) of Holland (died after 1203).

Count Arnold of Altena – Isenberg and Mathilde countess of Cleve had issue:

Coat of arms Arnold I count of Altena-Isenberg
The Isenberger Rose was the coat of arms of Friedrich von Isenberg. It had been adopted by his father, Arnold of Altena.
Waxseal of count Arnold I of Altena-Isenberg