| YEAR | DATE | EVENT | EARL |
| 1141 | Count - dinasty Wigerich | Ottone I | |
| 1170 | Enrico | ||
| 1185 | Ermanno | ||
| 1221 | Ottone II | ||
| 1244 | Ludovico | ||
| 1249 | Ottone III | ||
| 1306 | Ottone IV | ||
| 1328 | Bernardo | ||
| 1345 | Count of Count of Berg | ||
| 1539 | Count of Duchy of Kleve | ||
| 1614 | Count of Markgraft of Brandenburg | ||
| 1806 | Union to Markgraft of Brandenburg | ||
| 1918 | 9 november | Union to German State of Westfalia |