Question: Who is the paternal grandfather of Adolf Iv, Count Of Berg?

Context paragraphs:
title: William I of Berg
paragraph_text: William I of Berg( c. 1242 – 16 April 1308) was the son of Count Adolf VII of Berg and of Margaret of Hochstaden. Upon the death of his brother, Count Adolf VIII of Berg, William succeeded as Count of Berg. Formerly serving as a monk, he was absolved of his religious vows by the pope in order to take the position. His tenure was notable due to increased and constant conflict with the Archbishop of Cologne. In 1300 he supported King Albert I of Germany against the Rhenish electors which further strengthened his position against the archbishop. During his life he started foundations for monasteries and churches, including those in Beyenburg( now part of Wuppertal) and Gräfrath. He was also served as the benefactor of the citizens of Hückeswagen. William married Irmgard of Cleves(? –11 May 1319), widow of Conrad I of Saffenburg and daughter of Dietrich VI, Count of Cleves. William and Irmgard are buried in the Berg family vault of the Altenberg Cathedral. As William had no children, his nephew Adolf IX of Berg, son of his brother Henry of Berg, Lord of Windeck succeeded him as Count of Berg.
title: Adolf IX of Berg
paragraph_text: Adolf IX of Berg( also referred to as Adolf VI)( c. 1280 – 3 April 1348) was the eldest son of Henry of Berg, Lord of Windeck and Agnes of the Mark. In 1308, Adolf succeeded as Count of Berg upon the death of his uncle William I of Berg who had no children. Adolf was an important and loyal supporter of Ludwig IV of Bavaria, helping him since 1314 in the war of succession. As a result of Adolf's 1312 marriage to Agnes of Cleves, he received the Rhine customs of Duisberg as a dowry and these were confirmed as an imperial fief by Emperor Louis in 1314. He continued the constant feuds between the House of Berg and the Archbishops of Cologne. In 1327/ 28, he joined Louis on his trip to Rome where he was crowned as Emperor. Adolf received the privilege to mint silver which he did at Wipperfürth. In 1337 Adolf joined the English- German Alliance which caused the start of the Hundred Years' War. In 1312 Adolf was married to Agnes of Cleves( c. 1295 – aft. 1361), daughter of Dietrich VII, Count of Cleves and Margaret of Habsburg- Kiburg. He died on 3 April 1348 without children and was succeeded by his only surviving niece, Margaret of Ravensberg by right of her mother, and her husband Gerhard VI of Jülich as Count and Countess of Berg. Thus, the Counties of Berg and Ravensburg came in 1348 under the house of Jülich, and were in 1437 united with the County of Jülich. In 1511 all three passed into the house of Cleves.
title: Adolf IV, Count of Berg
paragraph_text: Adolf IV of Berg count of Berg from 1132 until 1160 and of Altena( died after 1161), son of Adolf III of Berg count of Berg and Hövel. He married( 1st) Adelheid von Arnsberg, a daughter of Heinrich count von Rietberg; then( 2nd) Irmgard von Schwarzenberg, a daughter of Engelbert von Schwarzenberg. He built the Schloss Altena, and built Altenberg Abbey( 1133) where he enters in 1160. He has issue from his first marriage: and from his second marriage:
title: Engelbert I, Count of Berg
paragraph_text: Count Engelbert I of Berg( d. July 1189 in Serbia) ruled the County of Berg from 1160 to 1189. He was the son of Adolf IV of Berg. Through his loyalty to the German Emperor and the Archbishops of Cologne he succeeded in stabilising the county and increasing its revenues. He took Bensberg Palace, Neu- Windeck and Elberfeld. In July 1189 he was killed near Kovin, in Serbia, while on his way to the Holy Land with the crusade of emperor Frederick Barbarossa. He married Margaret of Geldern( born 1157, died 1190?) and his sons were:
title: Henry of Berg, Lord of Windeck
paragraph_text: Henry of Berg, Lord of Windeck( bef. 1247 – 8 March 1290/ 96) was the son of Adolf VII of Berg and Margaret of Hochstaden. He was the younger brother of Adolf VIII of Berg and William I of Berg. From 1271- 1281 Henry served as a governor for his brother Adolf who became Count of Berg in 1259. Henry and his brother Adolf supported John I, Duke of Brabant in his succession war for the Duchy of Limburg, which culminated in the Battle of Worringen in 1288. Henry resided at Windeck castle, probably as an official of his brother. Windeck was one of the four main Berg castles, which had come into the possession of Berg by 1247. Henry is buried with other members of the house of Berg at Altenberg Cathedral.
title: William VII of Jülich, 1st Duke of Berg
paragraph_text: William VII of Jülich, 1st Duke of Berg( – 25 June 1408) was born in Jülich, as the son of Gerhard VI of Jülich, Count of Berg and Ravensberg, and Margaret, daughter and heiress of Otto IV, Count of Ravensberg, and Margaret of Berg. Upon his father's death in 1360, William became Count of Berg and Ravensberg, a title that his father had gained by marrying the heiress of Berg and Ravensberg. In 1380, King Wenzel elevated him to the rank of Duke, thus becoming the first Duke of Berg. William fought the counties of Mark and Cleves to prevent them from combining but in 1397 he was taken prisoner in the battle of Kleverhamm. He lost Remagen, Kaiserwerth and Sinzig to his nephew Adolf IV, Count of Kleve- Mark and due to these losses, his sons turned against him and imprisoned him in 1403/ 04. He ultimately forced them to submit and later supported his brother- in- law Rupert, King of Germany against Guelders- Jülich and won the county of Blankenburg. William died on 25 June 1408 and is buried in the Abteikirche in Altenberg.
title: Irmgard of Berg
paragraph_text: Irmgard of Berg, heiress of Berg( died 1248 – 1249), was the child of Adolf VI count of Berg( 1185–1218) and Berta von Sayn. She married in 1217 Henry IV, Duke of Limburg( since 1226), who became count of Berg in 1225. Henry IV of Limburg- Berg died on 25 Feb 1246; their descendants were counts of Berg, the county of Berg leaving the descendance of the Ezzonen.
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 III of Berg
paragraph_text: Bruno III of Berg( German:" Bruno III von Berg") was Archbishop of Cologne and Duke of Westphalia from 1191 until 1193. The fifth son of Adolf IV, Count of Berg, he is first mentioned in 1156 as provost of St. George in Cologne, and in 1168 as provost at Cologne Cathedral. Named in 1191 Archbishop of Cologne, he resigned in 1193, and finished his life as a monk in Altenberg. He died in 1193, and is buried in Altenberg.
title: Adolf II of Berg
paragraph_text: Adolf II of Berg- Hövel( Huvili), count of Berg, count in Auelgau and Siegburg, Vogt of Werden( died 1090/ 1106), was the son of Adolf I of Berg. He married Adelaide of Lauffen, a daughter of Heinrich II count von Laufen( died 1067) and Ida von Werl- Hövel( 1030? – 1090), and heiress of Hövel/ Huvili, Unna, Telgte, Warendorf, etc. At the beginning of the 12th century Adolf II of Berg donated the site of their old ancestral castle, Schloss Berg, to Cistercian monks from Burgundy. Adolf IV later built the Altenberg Abbey. He had issue:

Reasoning steps:
Adolf IV of Berg father Adolf III of Berg
Adolf III of Berg father Adolf II of Berg

Answer: spans: Adolf II of Berg