Question: Who is the paternal grandfather of Bruno Ii Von Berg?

Context paragraphs:
title: Friedrich von Berg
paragraph_text: Friedrich Wilhelm Bernhard von Berg, also von Berg- Markienen,( 20 November 1866 – 9 March 1939) was a German politician and chairman of the" Secret Civil Cabinet" of Kaiser Wilhelm II in 1918.
title: Bruno II von Berg
paragraph_text: Bruno II of Berg( German: Bruno II von Berg)( c. 1100 1137) was the Archbishop of Cologne from 1131 until 1137. Bruno II of Berg was a son of Count Adolf III of Berg. In 1119 he was mentioned as a Provost in Cologne, and he became the Provost of St. Gereon in Cologne in 1127. In 1130 he was elected the Archbishop of Trier but refused. Bruno was selected on Christmas Day of 1131 by King Lothar of Germany and a papal legate as the Archbishop of Cologne. In 1133 he converted his own keep at Altenberg into a monastery. Bruno died in 1137 in Apulia on campaign with King Lothair of Germany against Roger II of Sicily.
title: John Westley
paragraph_text: Rev. John Westley( 1636 – 78) was an English nonconformist minister. He was the grandfather of John Wesley( founder of Methodism).
title: Bruno von Porstendorf
paragraph_text: Bruno von Porstendorf otherwise Bruno II of Meissen or Bruno II von Porstendorf( died 4 December 1228) was Bishop of Meissen from 1209 to 1228. In older lists of the bishops of Meissen he is numbered as Bruno III because of the inclusion of an earlier Bruno II, who was a clerical error.
title: Adolf III of Berg
paragraph_text: Adolf III of Berg( 1080 – 12 October 1152) was count of Berg from 1093 until 1132, and count of Hövel from 1090 until 1106, and Vogt of Werden. He was the son of Adolf II of Berg- Hövel, count of Berg, and Adelaide of Lauffen. He married Adelheid of Cleves( von Kleve), a daughter of Dietrich II count of Cleves( died 1118). They had issue:
title: Bruno II of Isenburg-Braunsberg
paragraph_text: Bruno II of Isenburg- Braunsberg was the Count of Isenburg- Braunsberg from 1210 until 1255.
title: Abd al-Muttalib
paragraph_text: Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
title: Lyon Cohen
paragraph_text: Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist. He was the grandfather of singer/ poet Leonard Cohen.
title: Diepold of Berg
paragraph_text: Diepold Count von Berg, also: Theobald,( ca. 1140,- 3 November 1190 in Akkon) was the 11th Bishop of Passau from 1172 to 1190. Diepold von Berg was born around 1140 as the son of Diepold von Berg- Schelklingen and Gisela von Andechs. Both his older brother Heinrich and the younger Manegold played an important role in the history of the Diocese of Passau. His third brother, Otto II von Berg, was Bishop of Freising. Diepold was ordained priest on 10 June 1172 by Bishop Henry I of Gurk. On 23 November of the year, he was, at the urging of the Emperor Frederick Barbarossa( present at the ceremony), and with the consent of Pope Alexander III. New bishop of Passau. He thus succeeded the succession of his brother Heinrich von Berg. In 1178 he took part in the provincial synod in Hohenau at the Inn and traveled to Rome in 1179 to the third Lateran Council. Back at Passau had been visited by a large group of towns folk in a fury in 1181, Diepold energetically sought the reconstruction of the cathedral and the residence. In 1189, he accompanied Emperor Friedrich Barbarossa to the unsuccessful Third Crusade, and finally died in November 1190, together with six Passau Cathedral monks, during the siege of Acre in the camp near the city. Diepold was buried in the Holy Land.
title: Kaya Alp
paragraph_text: Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Reasoning steps:
Bruno II von Berg father Adolf III of Berg
Adolf III of Berg father Adolf II of Berg

Answer: spans: Adolf II of Berg