Catherine Vasa of Sweden
Catherine Vasa of Sweden (6 June 1539 – 21 December 1610) was a Swedish princess, and the Countess consort of East Frisia as the spouse of Edzard II, Count of East Frisia.
She was the oldest daughter of Gustav Vasa and Margareta Leijonhufvud.
She was the autonomous Regent of and Norden in Ostfriesland (East Frisia) from 1599 to 1610.
Rudolf Christian, Count of East Frisia
Rudolf Christian of Ostfriesland, Count of East Frisia, was count of East Frisia, (Hage, 2 June 1602 – Hage, 17 April 1628) and the second son of Enno III, Count of East Frisia and Anna of Holstein-Gottorp.
During his reign, foreign troops participating in the Thirty Years' War began retreating into and quartering in East Frisia.
Also during his reign, fen exploitation in East Frisia begins.
He reached a settlement with the East Frisian Estates, who them paid him homage, ultimately even the city of Emden did so.
Under his leadership, the Harlingerland was finally incorporated in the county of East Frisia.
This is visible in the county's coat of arms, which was introduced under his rule in 1625 and remained in use until the county was annexed by Prussia in 1744.
At the age of just 26, he got embroiled in a fight with a lieutenant of the army of general Matthias Gallas, which was quartered in Berum Castle.
He was stabbed in the left eye, and died of his wound.
Since Rudolf Christian was childless, he was succeeded as Count of East Frisia by his brother Ulrich II.
Edzard I, Count of East Frisia
Edzard I, also Edzard the Great (15 January 1462 in Greetsiel – 14 February 1528 in Emden)
was count of East Frisia from 1491 till his death in 1528.
Edzard succeeded his brother Enno in 1492.
He fought with George, Duke of Saxony over Friesland and Groningen.
The city of Groningen accepted him as its lord in 1506, but in 1514 renounced him again in favor of Charles of Guelders.
After he returned from a pilgrimage to Jerusalem in 1492, he took over the rule of East Frisia together with his mother Theda.
After his mother died in 1494, he ruled together with his less significant brother Uko.
Edzard's rule was characterized by his energetic approach against his opponents, the East Frisian leaders Hero Oomkens from Harlingerland and Edo Wiemken from Jever, whom he quickly managed to subdue.
He was also a supporter of the Protestant Reformation in his territories, through the creation of new East Frisian laws, the reform of the coinage and the introduction of primogeniture for his house, the house of Cirksena.
His foreign policies led to a three-year war (1514–1517) against Duke George of Saxony.
The war was mostly fought on East Frisian territory, and caused destruction in large areas.
The city of Aurich, for example, was burned to the ground.
Duke George of Saxony was appointed stadtholder of all Frisian territories in 1514 by Maximilian I, Holy Roman Emperor.
This was not accepted by the city of Groningen.
Count Edzard saw this as a chance to expand his influence in the province of Groningen, and proclaimed himself protector of the city.
As a result, 24 German dukes and counts invaded the Frisian lands with their troops and devastated the region.
Edzard was proclaimed an outlaw ("Reichsacht") by the emperor.
During the three-year war, Edzard eventually managed to keep the majority of East Frisia under his control.
Only when Charles V came to power in the Netherlands did Edzard manage to end the war by getting himself confirmed as ruler of East Frisia.
Enno I, Count of East Frisia
Enno I of East Frisia, count of East Frisia (1 June 1460 – Friedeburg, 19 February 1491) was the eldest son of Ulrich I of East Frisia and Theda Ukena, of a chiefly East Frisian family.
Eggerik Beninga
Eggerik Beninga( 1490 – 1562), also known as Eggeric( k) Benninga or Benynga, was an East Frisian chronicler and steward of the Leerort Fortress.
From 1540 to 1556 he was also counselor to Anna of Oldenburg.
He wrote an account of the history of the Frisians until the year
1562 A.D. Beninga was born in Grimersum, now a part of Krummhörn municipality, Germany.
He was the son of Garrelt Beninga, chieftain and bailiff at Wirdum, Jennelt and Grimersum, and of Essa Houwerda of Up- and Wolthusen, daughter of Snelger Houwerda from Termunten.
His father's family was an established family of East Frisian chieftains and Eggerik himself came to serve at the court of Edzard I, Count of East Frisia at a young age.
As a chronicler he wrote the" Volledige Chronyk van Oostfrieslant" in Dutch or" Cronica der Fresen" in Low German language[" Complete Chronicle of East Frisia" and" Chronicle of the Frisians", respectively].
The account does not only deal with events concerning East Frisia but also lists the history of all neighbouring peoples.
His sources remain unknown, which is why the authenticity of his work has been questioned.
Many events described by Benninga are however known from secondary historians of the time.
His history of East Frisia was edited by Eilhardus Folkardus Harkenroth( 1670 – 1732).
Another edition by Anthonius Matthaeus was printed in Leiden in 1706 based on a different manuscript.
Eggerik Beninga died in Grimersum in 1562.
Minamoto no Chikako
She was the mother of Prince Morinaga.
Christine Charlotte of Württemberg
Christine Charlotte of Württemberg( 21 October 1645, Stuttgart – 16 May 1699, Bruchhausen) was a princess consort of East Frisia by marriage to George Christian, Prince of East Frisia.
She served as the regent of East Frisia during the minority of her son from 1665 until 1690.
Margaretha von Waldeck
Margaretha von Waldeck( 1533 – 15 March 1554) was the daughter of Philip IV, Count of Waldeck- Wildungen( 1493 – 1574) and his first wife, Margaret Cirksena( 1500 – 1537), daughter of Edzard I, Count of East Frisia.
She is believed to be an influence for the fairy tale of Snow White.
Ulrich II, Count of East Frisia
Ulrich II of East Frisia, was count of East Frisia,( 6 July 1605 – Aurich, 1 November 1648) was the fifth child and the third son of Enno III, Count of East Frisia and Anna of Holstein- Gottorp.
He inherited the East Frisia after the unexpected death of his brother Rudolf Christian on 17 April 1628.
He reigned during the Thirty Years' War.
East Frisia did not participate in the war, but general Ernst von Mansfeld quartered his troops in East Frisia, causing great distress.
The only exception was Emden because of the recently completed city wall, the city of Emden was protected against foreign troops.
Enno Louis, Prince of East Frisia
Enno Louis of East Frisia, was count of East Frisia and after 1654 "Fürst (Prince) of East Frisia", (29 October 1632 – Aurich, 4 April 1660) and the son of Ulrich II and Juliana of Hesse-Darmstadt.

Question: Who is Edzard I, Count Of East Frisia's mother?