Adolf I of Lotharingia
Adolf I of Lotharingia, count of Keldachgau, Vogt of Deutz from 1008 until 1018, was the son of Hermann I" Pusillus"( the Little Pfalzgraf), count palatine of Lotharingia.
He left three sons:
John Christian, Count Palatine of Sulzbach
John Christian( 23 January 1700 – 20 July 1733;" in German: Johann Christian Joseph") was the Count Palatine of Sulzbach from 1732 – 33.
He was the second and youngest surviving son of duke Theodore Eustace, Count Palatine of Sulzbach( 1659 – 1732) with his consort Eleonore Maria Amalia of Hesse- Rotenburg( 1675 – 1720).
His elder brother was Joseph Charles, Count Palatine of Sulzbach.
Reichard, Count Palatine of Simmern-Sponheim
Reichard (25 July 1521 – 13 January 1598) was the Count Palatine of Simmern-Sponheim from 1569 until 1598.
Reichard was born in Simmern in 1521 to Johann II, Count Palatine of Simmern.
In 1569 he succeeded his brother Georg as Count Palatine of Simmern-Sponheim.
Reichard died in Simmern in 1598.
Without any surviving children, Simmern-Sponheim was inherited by his great-nephew Frederick IV.
Hermann II, Count Palatine of Lotharingia
Hermann II (born 1049; died Dalhem, 20 September 1085), Count Palatine of Lotharingia 1064–1085.
He was count in the Ruhrgau and the Zulpichgau, as well as count of Brabant.
According to Egon Kimpen he was the son of Henry I of Lotharingia († 1061) and Mathild of Verdun († 1060), daughter of Gozelo I of Lotharingia, but the basis for this has been questioned.
In 1080 he married Adelaide of Weimar-Orlamünde († 1100), widow of Adalbert II, Count of Ballenstedt.
She was a daughter of Otto of Orlamünde, count of Weimar and margrave of Meissen in Thuringia, and Adela of Brabant.
Together they had two children who had died by 1085.
He is assumed to have been the last Count Palatine of Lotharingia of the Ezzonian dynasty.
He was killed in a duel with Albert III, Count of Namur, near his castle in Dalhem (County of Limburg).
His widow married again, her third husband being Henry of Laach, count in the Mayfeldgau, who became the first count palatine of the Rhine between 1085 and 1087.
Henry of Laach
Henry of Laach (In German: "Heinrich von Laach") was the first count palatine of the Rhine (1085/1087–1095).
Henry was the son of Herman I, count of Gleiberg.
Henry was a follower of Henry IV, Holy Roman Emperor.
He had lands in the southeastern Eifel and on the Moselle River.
Most of the holdings of Hermann II, Count Palatine fell back to the emperor, when Hermann died without successor.
The emperor named Henry count palatine of the Rhine and during the emperor's trip to Italy tasked Henry to hold interim judicial councils.
Henry married Herman's widow, Adelaide of Weimar-Orlamünde (d. 1100).
From this marriage, Henry may have taken control over some of her holdings along the Moselle.
As a consequence, the geographic center of the palatinate moved towards the south.
With his wife, Adelaide, Henry founded the Maria Laach Abbey.
He was succeeded by his stepson, Siegfried of Ballenstedt.
Henry I, Count Palatine of Lotharingia
Henry I (also Heinrich I) (d.1061), was Count Palatine of Lotharingia from 1045 until 1060.
He was the son of Hezzelin I, Count in Zülpichgau, and a member of the Ezzonid dynasty.
Historians have given several nicknames to Heinrich: "Furiosus" (the Violent/the Insane), because he murdered his wife, and "Monachus" (the Monk), because he was confined into an abbey to treat his insanity.
Otto I, Count Palatine of Mosbach
Otto I( 24 August 1390 – 5 July 1461) was the Count Palatine of Mosbach from 1410 until 1448, and the Count Palatine of Mosbach- Neumarkt from 1448 until 1461.
Rudolph II, Count Palatine of Tübingen
Rudolph II, Count Palatine of Tübingen( died 1 November 1247) was Count Palatine of Tübingen and Vogt of Sindelfingen.
He was the younger son of Rudolph I and his wife Matilda of Gleiberg, heiress of Giessen.
Sabina, Duchess of Bavaria
Sabina, Duchess of Bavaria( 1528 –1578) was the daughter of John II, Count Palatine of Simmern and Beatrix of Baden.
Philip William August, Count Palatine of Neuburg
Philip William August, Count Palatine of Neuburg( born 19 November 1668 in Neuburg an der Donau; died: 5 April 1693 in Zákupy) was a Prince and Count Palatine of Neuburg.

Question: Who is Hermann Ii, Count Palatine Of Lotharingia's paternal grandfather?
Answer: Hezzelin I