Dorothea Sophia, Abbess of Quedlinburg
Duchess Dorothea Sophia of Saxe- Altenburg( 19 December
1587 – 10 February 1645) was Princess- Abbess of Quedlinburg.
She was the fourth child and second daughter of Friedrich Wilhelm I, Duke of Saxe- Weimar, and his first wife, Sophie of Württemberg.
Matilda, Abbess of Quedlinburg
Matilda (December 955 – 999), also known as Mathilda and Mathilde, was the first Princess-Abbess of Quedlinburg.
She was the daughter of Otto I, Holy Roman Emperor, and his second wife, Adelaide of Italy.
Otto I, Holy Roman Emperor
Otto I (23 November 912 – 7 May 973), traditionally known as Otto the Great , was German king from 936 and Holy Roman Emperor from 962 until his death in 973.
He was the oldest son of
Henry I the Fowler and Matilda.
Otto inherited the Duchy of Saxony and the kingship of the Germans upon his father's death in 936.
He continued his father's work of unifying all German tribes into a single kingdom and greatly expanded the king's powers at the expense of the aristocracy.
Through strategic marriages and personal appointments, Otto installed members of his family in the kingdom's most important duchies.
This reduced the various dukes, who had previously been co-equals with the king, to royal subjects under his authority.
Otto transformed the Roman Catholic Church in Germany to strengthen royal authority and subjected its clergy to his personal control.
After putting down a brief civil war among the rebellious duchies, Otto defeated the Magyars at the Battle of Lechfeld in 955, thus ending the Hungarian invasions of Western Europe.
The victory against the pagan Magyars earned Otto a reputation as a savior of Christendom and secured his hold over the kingdom.
By 961, Otto had conquered the Kingdom of Italy.
The patronage of Otto and his immediate successors facilitated a so-called "Ottonian Renaissance" of arts and architecture.
Following the example of Charlemagne's coronation as "Emperor of the Romans" in 800, Otto was crowned Holy Roman Emperor in 962 by Pope John XII in Rome.
Otto's later years were marked by conflicts with the papacy and struggles to stabilize his rule over Italy.
Reigning from Rome, Otto sought to improve relations with the Byzantine Empire, which opposed his claim to emperorship and his realm's further expansion to the south.
To resolve this conflict, the Byzantine princess Theophanu married his son Otto II in April 972.
Otto finally returned to Germany in August 972 and died at Memleben in May 973.
Otto II succeeded him as Holy Roman Emperor.
Adelaide II, Abbess of Quedlinburg
Adelaide II( 1045 – 11 January 1096), a member of the Salian dynasty, was Abbess of Gandersheim from 1061 and Abbess of Quedlinburg from 1063 until her death.
Anna Amalia, Abbess of Quedlinburg
Princess Anna Amalia of Prussia (9 November 1723 – 30 March 1787) was Princess-Abbess of Quedlinburg.
She was one of ten surviving children of King Frederick William I of Prussia and Sophia Dorothea of Hanover.
Adelaide I, Abbess of Quedlinburg
Adelaide I( 973/74 – 14 January 1044 or 1045), a member of the royal Ottonian dynasty was the second Princess- abbess of Quedlinburg from 999, and Abbess of Gernrode from 1014, and Abbess of Gandersheim from 1039 until her death, as well as a highly influential kingmaker of medieval Germany.
Beatrice I, Abbess of Quedlinburg
Beatrice I, also known as Beatrice of Franconia( 1037 – 13 July 1061), was Abbess of Gandersheim Abbey from 1043 and Princess- Abbess of Quedlinburg Abbey from 1044 until her death.
Beatrix was born in Italy towards the end of 1037 as the only child of the Holy Roman Emperor Henry III and his first wife, Gunhilda of Denmark, who died about six months after Beatrice's birth.
Agnes II, Abbess of Quedlinburg
Agnes II( Agnes of Meissen; 1139 – 21 January 1203) was a member of the House of Wettin who reigned as Princess- Abbess of Quedlinburg.
Hedwig, Abbess of Quedlinburg
Hedwig of Saxony( 31 October 1445 – 13 June 1511) was Princess- Abbess of Quedlinburg from 1458 until her death.
Anna Sophia II, Abbess of Quedlinburg
Landgravine Anna Sophia of Hesse- Darmstadt( 17 December 1638 – 13 December 1683) was a German noblewoman who reigned as Princess- Abbess of Quedlinburg under the name Anna Sophia II.

Question: Who is the paternal grandfather of Matilda, Abbess Of Quedlinburg?
Answer: Henry I