According to the German, Dutch and French Wikipedia there was only one Dietrich between 1172 and 1198. This Dietrich was the son of Dietrich II and Adelaide of Sulzbach and was married to Margaret of Holland. This would make Dietrich III and Dietrich IV the same person.
Guelders or Gueldres is a historical county, later duchy of the Holy Roman Empire, located in the Low Countries.
Kleve is a town in the Lower Rhine region of northwestern Germany near the Dutch border and the river Rhine. From the 11th century onwards, Cleves was capital of a county and later a duchy. Today, Cleves is the capital of the district of Cleves in the German state of North Rhine-Westphalia. The city is home to one of the campuses of the Rhine-Waal University of Applied Sciences.
Berg was a state—originally a county, later a duchy—in the Rhineland of Germany. Its capital was Düsseldorf. It existed as a distinct political entity from the early 12th to the 19th centuries.
The County of Mark was a county and state of the Holy Roman Empire in the Lower Rhenish–Westphalian Circle. It lay on both sides of the Ruhr river along the Volme and Lenne rivers.
John III, Duke of Cleves and Count of Mark, called John the Peaceful, was a son of John II, Duke of Cleves and Mathilde of Hesse, daughter of Henry III, Landgrave of Upper Hesse.
The Duchy of Jülich comprised a state within the Holy Roman Empire from the 11th to the 18th centuries. The duchy lay west of the Rhine river and was bordered by the Electorate of Cologne to the east and the Duchy of Limburg to the west. It had territories on both sides of the river Rur, around its capital Jülich – the former Roman Iuliacum – in the lower Rhineland. The duchy amalgamated with the County of Berg beyond the Rhine in 1423, and from then on also became known as Jülich-Berg. Later it became part of the Duchies of Jülich-Cleves-Berg.
The Duchy of Cleves was a State of the Holy Roman Empire which emerged from the medieval Hettergau. It was situated in the northern Rhineland on both sides of the Lower Rhine, around its capital Cleves and the towns of Wesel, Kalkar, Xanten, Emmerich, Rees and Duisburg bordering the lands of the Prince-Bishopric of Münster in the east and the Duchy of Brabant in the west. Its history is closely related to that of its southern neighbours: the Duchies of Jülich and Berg, as well as Guelders and the Westphalian county of Mark. The Duchy was archaically known as Cleveland in English.
Goch is a town in the district of Kleve, in North Rhine-Westphalia, Germany. It is situated close to the border with the Siebengewald in Netherlands, approx. 12 km (7 mi) south of Kleve, and 27 km (17 mi) southeast of Nijmegen.
Jülich-Cleves-Berg was the name of two former territories across the modern German state of North Rhine-Westphalia and the modern Dutch province of Gelderland. From 1521 to 1666, the territory was a combination of states in personal union, all reichsfrei territories of the Holy Roman Empire. The name was resurrected after the Congress of Vienna for a short-lived province of the Kingdom of Prussia between 1815 and 1822.
Johann Wilhelm of Jülich-Cleves-Berg was a Duke of Jülich-Cleves-Berg.
The Province of Jülich-Cleves-Berg was a province of Prussia from 1815 to 1822. Jülich-Cleves-Berg was established in 1815 from land annexed by the Kingdom of Prussia from France and the Grand Duchy of Berg, and was dissolved in 1822 when it was merged with the Grand Duchy of the Lower Rhine to form Rhine Province.
The Grand Duchy of Berg, also known as the Grand Duchy of Berg and Cleves, was a territorial grand duchy established in 1806 by Emperor Napoleon after his victory at the Battle of Austerlitz (1805) on territories between the French Empire at the Rhine river and the German Kingdom of Westphalia.
Dietrich I was the first Count of Cleves. He reigned from 1092 through 1119. The County of Cleves was a comital polity of the Holy Roman Empire in present Germany and the Netherlands. 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, and its rulers were raised to the status of Dukes.
Arnold I was Count of Cleves from 1119 through 1147. Son of Dietrich I, Count of Cleves.
Dietrich II was Count of Cleves from 1147 through 1172, son of Arnold I, Count of Cleves and Ida, the daughter of Godfrey I, Count of Louvain.
Dietrich IV was Count of Cleves from 1188 through 1198.
Arnold II was Count of Cleves from 1198 through 1201, possibly as a regent for Dietrich V.
Dietrich VI, was Count of Cleves from 1260 through 1275. He was born in 1226 as the son of Dietrich V, Count of Cleves and Hedwig of Meissen.
Dietrich VII (1256–1305) was Count of Cleves from 1275 through 1305. He was the son of Dietrich VI, Count of Cleves and his wife Aleidis von Heinsberg.
Charles Frederick of Jülich-Cleves-Berg, was Hereditary Prince of the United Duchies of Jülich-Cleves-Berg and the counties of Mark and Ravensberg.
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