Friderada
Friderada was a ninth-century noblewoman about whom very little is known.
She was probably related to Liudolf, Duke of Saxony.
Friderada married at least three times and was the grandmother of Otto, Duke of Lorraine.
Her first husband was Engelram, Chamberlain to Charles the Bald (d. 877).
That union produced a daughter, whose name is not known.
This daughter married Ricwin, Count of Verdun, as his first wife.
Their only child was Otto, Count of Verdun and Duke of Lorraine.
Widowed, Friederada married Bernarius, Count of Charpeigne, about whom nothing further is known.
Bernarius was murdered in 883 by Hugh, Duke of Alsace, son of Lothair II, King of Lotharingia, and his concubine Waldrada, and Friderada married her husband's murderer.
No children are recorded.
Friderada's grandson Otto, Duke of Lorraine, is identified as the son of a Count Ricwin and a Liudolfing, and a relative of Otto I, Holy Roman Emperor.
Chronologically, Friderada could possibly have been a daughter or granddaughter of Liudolf, but no concrete evidence of this exists.
According to the Medieval Lands Project, Friderada had two husbands between Engelram and Hugh: Bernarius, and Wipert of Nantes, son of Lambert III of Nantes and Rotrude of Italy, daughter of Lothair I, Holy Roman Emperor.
Wipert had one son, also named Wipert (880-900), but it is not clear that Friderada was the mother.
Both Bernarius and Wipert were reportedly executed in 883 by Hugh in order to marry the widow, so it is unlikely that they were both Friderada’s husband.
Note that Hugh and Wipert were first cousins.
An alternative narrative is provided by Jackman.
In this analysis, Bernarius was married to a sister of Wipert.
Wipert was the guardian of Hugh, and married to Friderada.
Bernarius and Wipert were allies of Hugh, but turned against him once his aspirations towards royal succession surfaced, and so Hugh murdered them both and married the widow Friderada.
Jørgen Ringnis
Jørgen Ringnis, also known as" Jørgen Billedsnider",( birth unknown, died 1652 in Nakskov) was a Danish woodcarver.
He created a number of altarpieces and pulpits in Danish churches, especially on the islands of Lolland and Falster.
Emperor Daigo
Daigo's reign spanned the years from 897 through 930.
He is named after his place of burial.
Oda of Saxony
Oda of Saxony( 877 – aft. 952) was a Saxon princess.
She was the daughter of Otto I, Duke of Saxony( 880 – 912) and Hedwiga of Babenberg.
She married King Zwentibold of Lotharingia and at his death in August 900( when Oda was younger than 15), she contracted a second marriage with Count Gerhard I of Metz.
From this union were born:
Francis Otto, Duke of Brunswick-Lüneburg
Francis Otto, Duke of Brunswick- Lüneburg( 1530 – 1559) was the Prince of Lüneburg from 1555 to 1559.
He was the son of Ernest I, Duke of Brunswick- Lüneburg.
Euphemia of Pomerania
Euphemia of Pomerania (1285 – 26 July 1330) was Queen of Denmark as the spouse of King Christopher II.
She was the daughter of Bogislaw IV, Duke of Pomerania, and his second spouse, Margarete of Rügen.
Euphemia wed Christopher in 1300.
The marriage was likely a politically arranged marriage to provide Christopher with political support from the dynasty of her mother as well as that of her father.
Not much is known about queen Euphemia.
Euphemia had at least six known children:
She is buried in the Sorø Abbey.
Otto, Duke of Lolland and Estonia
Otto of Denmark (c. 1310 – after 1346)  was a Danish prince who was also Duke of Lolland and Estonia.
He was the second son of King Christopher II of Denmark and Euphemia of Pomerania.
In his childhood his older brother Eric had been elected as junior king of Denmark.
Otto was given the titles Duke of Lolland and Estonia and was expected to expand the Danish conquest of Estonia acquired during Livonian Crusade.
His father and brother were deposed in 1326 and restored three years later on the condition his father signed a charter that gave him little to no power while the Danish nobles and the Counts of Holstein ruled behind the scene and mortgaged most of the kingdom.
His brother Eric predeceased both Otto and his father, fighting to rid Denmark from the rule of the Counts of Holstein.
King Christopher died in 1332, leaving Otto and his younger brother Valdemar as his only sons and potential heirs to the throne.
The Danish nobles for some reason decided not to elect a successor.
In 1332, Otto made an attempt to win the Danish crown, but was defeated by Count Gerhard III of Holstein on Taphed at Viborg on 7 October 1334.
He was held prisoner in the Segeberg Castle.
Upon his father's death and his failed attempt to seize the throne, Denmark ceased being a formal kingdom, and for the next eight years it was subjected by various mortgagees to German military rule.
His younger brother would later regain Denmark from the Holsteiners and succeed as Valdemar IV of Denmark.
Once Valdemar became king in 1340, Otto was released on the condition that he surrender his claim to the throne.
Otto subsequently went to Germany, and joined the Teutonic Order in 1346.
The Order bought his duchy in the same year, and no further information is recorded about him.
Otto is the other (?
Translation needed?)
hero of Bernhard Severin Ingemann's novel, "Prins Otto af Danmark og Hans Samtid" (Prince Otto of Denmark and his Time, 1835).
Marianne Gaarden
Marianne Gaarden( born 4 February 1964) is a Danish prelate who is the 21st and current Bishop of Lolland- Falster.
Otto I, Duke of Brunswick-Harburg
Otto, Duke of Brunswick- Lüneburg( 24 August 1495 – 11 August 1549) was the Prince of Lüneburg from 1520 to 1527 and Baron of Harburg from 1527 to 1549.
Otto, Duke of Brunswick-Grubenhagen
Otto, Duke of Brunswick- Grubenhagen( 1320 – 1 December 1398) was the fourth and last husband of Joanna I of Naples.
He also held the title of Prince of Taranto.
His nickname was Otto the Tarantine.

Question: Where was the place of burial of Otto, Duke Of Lolland And Estonia's mother?
Answer: Sorø Abbey