Richardis of Bavaria
Richardis of Bavaria (1173 in Kelheim – 7 December 1231 in Roermond) was a German noblewoman.
She was a daughter of Count Palatine Otto I of Bavaria, who later became the first Wittelsbach "Duke" of Bavaria, and his wife Agnes of Loon.
Reginald II, Duke of Guelders
Reginald II of Guelders, called" the Black"( c. 1295 – 12 October 1343), was Count of Guelders, and from 1339 onwards Duke of Guelders, and Zutphen, in the Low Countries, from 1326 to 1343.
He was the son of Reginald I of Guelders and Marguerite of Flanders.
Otto I, Count of Guelders
Otto I of Guelders (1150–1207) was a Count of Guelders and Zutphen from 1182 until his death in 1207.
He was a son of Duke Hendrik of Guelders and Agnes of Arnstein.
He married Richardis of Bavaria in 1184.
Richardis was a daughter of Otto
I Wittelsbach, Duke of Bavaria.
Otto I (bishop of Utrecht)
Otto van Gelre( 1194 – 1 September 1215) was bishop of Utrecht from 1212 to 1215.
Otto van Gelre was the son of Otto I, Count of Guelders and Richardis of Bavaria.
He was appointed bishop at a young age with the support of Guelders and the Hohenstaufen.
He was a loyal supporter of Guelder's interests in the Bishopric of Utrecht.
He died at Voorthuizen at Elten, on the way to Rome.
Otto IV, Count of Scheyern
Otto V, Count of Wittelsbach (– 4 August 1156), also called Otto IV, Count of Scheyern, was the second son of Eckhard I, Count of Scheyern.
Otto named himself "Otto of Wittelsbach", after Wittelsbach Castle near Aichach.
He served Henry V, Holy Roman Emperor, in his first Italian Expedition in 1110–1111.
Emperor Henry V already addressed him as Otto Count of "Witlinesbac" in a document in 1115.
From 1120 onwards, he was Count palatine of Bavaria.
Reginald III, Duke of Guelders
Reginald III of Guelders( or" Renaud", known as" The Fat")( 13 May 1333 – 4 December 1371) was Duke of Guelders and Count of Zutphen from 1343 to 1361, and again in 1371.
He was the son of Reginald II of Guelders and of Eleanor of Woodstock, daughter of Edward II of England.
With the death of his father in 1343, his mother held the regency until 1344.
From 1350, his brother Edward asserted his rights and a quarrel of succession broke out between the two brothers until 1361.
Reginald was overcome in Tiel and was imprisoned in the castle of Nijenbeek.
There he became so large that he could not have left, even if the door had remained open—hence his appellation" The Fat".
Edward died on 24 August 1371, having been mortally wounded in the Battle of Baesweiler, and Reginald was released( according to the legend, the walls had to be cut away so he could leave); he held the ducal throne for only a short period, dying a few months later.
He was buried at Graefenthal Abbey.
As he did not have a legitimate child, the succession passed to his sisters: Mathilde( also, Machteld), who was married to John II, Count of Blois, and Maria, wife of William II of Jülich and mother to William I of Guelders and Jülich, on whose behalf she claimed the throne of Guelders.
The sisters and their respective followers( the" Heeckerens", from the party led by families of Van Heeckeren and their relatives, the Van Rechterens, supported Mathilde, while the faction known as the" Bronkhorsters" followed Maria) fought for the duchy of Guelders in the War of the Succession of Guelders.
Gerard II, Count of Guelders
Gerard II was Count of Guelders from March 1129 until his death on October 24, 1131.
He was the son of Gerard I, Count of Guelders.
Around 1116, Gerard married Ermgard of Zutphen, daughter of Otto II, Count of Zutphen and Judith of Arnstein.
They had two children:
Gerard III, Count of Guelders
Gerard III of Guelders( 1185 – 22 October 1229) was the Count of Guelders and Zutphen from 1207 until his death in 1229.
He was a son of Count Otto I of Guelders, and is sometimes called Gerard IV or Gerard V.
He married Margaretha of Brabant, the daughter of Duke Hendrik I of Brabant, in 1206.
Irmgard of Cleves
Irmgard of Cleves( also known as" Irmengard von Kleve") was the wife of John IV, Lord of Arkel.
Born in 1307, she was the only daughter of Otto, Count of Cleves and his wife, Mechteld von Virneburg.
Her father, Count Otto died shortly after her birth.
Otto II, Count of Guelders
Otto II, Count of Guelders( Dutch: Otto II, Graaf van Gelre) was a nobleman from the 13th century.
He was the son of Gerard III, Count of Guelders and Margaretha of Brabant.

Question: Where was the wife of Otto I, Count Of Guelders born?
Answer: Kelheim