Goeric of Metz
Goeric of Metz( died September 19 643 AD), also known as Abbo I of Metz, Goericus of Metz, and Gury of Metz, was a bishop of Metz.
He is venerated as a saint in the Eastern Orthodox and Roman Catholic Churches.
Henry I, Count of Durbuy
Henry I( died 1097), Count of Durbuy, son of Albert II, Count of Namur, and Regilende, daughter of Gothelo I, Count of Verdun and Duke of Lorraine.
Emperor Henry IV confirmed donations made by Henry to Saint James's Church, Liège, as witnessed by Giselbert II, Count of Duras.
Henry participated in the First Crusade and died in Jerusalem in 1097.
Henry was married, but the name of his wife is unknown.
They had one child: Upon his death, Henry was succeeded as Count of Durbuy by his son Godefroi.
Pepin III, Count of Vermandois
Pepin III, Count of Vermandois( also known as Pepin II, Count of Senlis; French:" Pépin")( c. 846 – 893) was a Frankish noble; the Count of Senlis and Count of Vermandois( 850 – 893); Lord of Valois( 877 – 886), and later Count of Valois( 886 – 893).
He was a son of Pepin, Count of Vermandois and Valois and thus a grandson of Bernard of Italy, who was himself a grandson of Charlemagne.
The brothers of Pepin III were Herbert I, Count of Vermandois and Bernard II, Count of Laon.
Pepin III of Vermandois's wife is unknown; their son was:
Gerhard I of Metz
Gerhard I of Metz( c. 875 – 22 Jun 910) was count of Metz.
He was the son of Adalhard( c. 850 – 2 Jan 890), count of Metz, himself son of Adalard the Seneschal and a daughter of Matfried, count of Eifel( c. 820 – bef. 18 Sep 882)
Alberic III of Dammartin
Alberic III of Dammartin( Aubry de Dammartin)( – 19 September 1200) was a French count and son of Alberic II, Count of Dammartin, and Clémence de Bar, daughter of Reginald I, Count of Bar.
He married Mathilde, heiress to the county of Clermont and daughter of Renaud II, Count of Clermont.
They had:
Christian II, Count of Oldenburg
Christian II, Count of Oldenburg( died 1233) was a German nobleman.
He was the ruling Count of Oldenburg from 1209 until his death.
Adalhard of Metz
Adalhard II (c. 840 – 2 Jan  890) was Count of Metz and Mozelgau.
He was probably the son of Adalard the Seneschal.
Theobald II of Blois
Theobald II, Count of Blois( Thibaut II; c. 985 – 11 July 1004) was the eldest son and heir of Odo I, Count of Blois, and Bertha of Burgundy.
The stepson of Robert II of France, he became Count of Blois, Châteaudun, Chartres and Reims after the death of his father in 996.
Theobald II left no heirs; on his death, he was succeeded by his younger brother, Odo II, Count of Blois.
Abbo II of Metz
Abbo II of Metz was the thirty- fifth bishop of the Diocese of Metz, following Landry of Metz.
He is commemorated with a feast day of 15 April.
Abbo served as bishop from 697-707.
Adalard the Seneschal
Adalard, also known as Adalhard or Alard, and called "the Seneschal", was a Frankish nobleman of the 9th century.
He served as warden of the Norman march from 861 to 865, and was Lord Chancellor of France under Louis the Pious.
He was a son of Leuthard I of Paris and brother of Gerard II of Paris.
Louis the Pious made him seneschal of the Carolingian Empire.
On Louis' death, he joined Charles the Bald and arranged a marriage between the king and Ermentrude of Orléans, his niece by Ingeltrude of Fézansac and Odo, Count of Orléans.
After the Treaty of Verdun (in 843), Adalard went to serve Louis the German in East Francia.
In 861, after the revolt of Carloman, Louis' eldest son, Adalard and his relatives Udo, Berengar, and Waldo took refuge at the court of Charles in Paris.
Charles granted him the Norman March of Neustria, to defend it against the Vikings.
However, he soon incited the jealousy of the Rorgonids, then the most powerful clan in Maine.
Allied with Salomon, King of Brittany, they revolted against him and made war.
After peace was settled, Charles transferred the March to Gosfrid, the representative of the Rorgonids.

Question: Who is the paternal grandfather of Adalhard Of Metz?