Theodorich II 1050 graf von Kleve

1050 is a better birth year estimation than 1070.

Please note that the numbering system for the Dietrich/Dirk/Didrik/Dideric/Theoderic lineage is contested, which adds even more confusion.

Source: Johann Georg Lairitz, Neu-angelegter historisch genealogischer Palm-Wald (Nuremberg, 1686) places him as son of Conrad but gives death date as 1088.

from soc.gen.medieval posted May 3, 2009 by Leo:

a.. Dietrich was born about 1070. He became Graf von Kleef between 1092 and 1117. While he was referred to in earlier research as Dietrich III (occasionally also as Dietrich II), he is referred to in more recent research as Dietrich I.

 b.. In 1092 Dietrich is mentioned as comes Thiedercus de Cleve. He was the first count who was called explicitly after the castle of Kleef (Kleve, Cleve, Cleves) from which the family took its name. However he was also occasionally referred to as Graf von Tomburg. In 1094/95 he was mentioned as a steward of the abbey of Brauweiler near Cologne, and in 1117 as steward of the convent of Zyfflich together with his son and later successor Arnold. As Arnold was referred to in 1120 as Graf von Kleef, Dietrich must have already died by then.

Wikipedia: http://de.wikipedia.org/wiki/Dietrich_I./III._%28Kleve%29

https://en.wikipedia.org/wiki/Dietrich_I,_Count_of_Cleves

Dietrich I, Count of Cleves

Dietrich I was the first Count of Cleves. He reigned from 1092 through 1119. The County of Cleves (German: Grafschaft Kleve; Dutch: Graafschap Kleef) was a comital polity of the Holy Roman Empire in present Germany (part of North Rhine-Westphalia) and the Netherlands (parts of Limburg, Noord-Brabant and Gelderland). Its rulers, called counts, had a special and privileged standing in the Empire. The County of Cleves was first mentioned in the 11th century. In 1417, the county became a duchy (German: Herzogtum Kleve; Dutch: Hertogdom Kleef), and its rulers were raised to the status of Dukes.

Its history is closely related to that of its neighbours: the Duchies of Jülich, Berg and Guelders and the County of Mark. In 1368, Cleves and Mark were united. In 1521 Jülich, Berg, Cleves and Mark formed the United Duchies of Jülich-Cleves-Berg. The territory was situated on both sides of the river Rhine, around its capital Cleves and roughly covering today's districts of Cleves, Wesel and the city of Duisburg.

Count of Cleves 1092–1119 Preceded by none Succeeded by Arnold I