Otto III, Duke of Swabia
Otto III (died 28 September 1057), called the White and known as Otto of Schweinfurt, was the margrave of the Nordgau (1024–1031) and duke of Swabia (1048–1057).
He was the son of Henry of Schweinfurt, margrave of the Nordgau, and Gerberga of Henneberg.
He was one of the most powerful East Franconian princes by inheritance: having extensive land in the Radenzgau and Schweinfurt.
In 1014, he first appears as count of Lower Altmühl (or Kelsgau) and, in 1024, he inherits his father's march.
In 1034, he became count of the Lower Naab.
From then on to his appointment to Swabia, he takes part in many imperial expeditions into Bohemia, Hungary, and Poland.
At Ulm in January 1048, the Emperor Henry III appointed him duke of Swabia after a brief vacancy following the death of Otto II.
He was loyal to Henry.
He was engaged to marry Matilda, daughter of Boleslaus I of Poland, in 1035, but this was put off in favour of a marriage to Immilla, a daughter of Ulric Manfred, Margrave of Turin, as part of Henry's Italian plans.
He was otherwise inactive and died after nine years rule and was buried in Schweinfurt.
Otto III of Ravensberg
Otto III of Ravensberg( – 5 March 1306) was Count of Ravensberg from 1249 until his death.
Otto III, Count of Rietberg
Count Otto III Rietberg (between 1475 and 1485 – 18 December 1535) was Count of Rietberg from 1516 to 1535.
Otto III was probably born between 1475 and 1485 as the eldest son of John I and his wife Margaret of Lippe.
Otto's second wife, Onna of Esens, introduced the Reformation in the County of Rietberg.
In 1533, Otto III appointed two preachers from Lippe, to teach the new faith in the parishes of Rietberg and Neuenkirchen.
Otto III suffered from ulcers on his leg.
He died on 18 December 1535 and was buried in the Marienfeld Abbey.
He was the last Count of Rietberg to be buried there.
On his gravestone in the cloister before the winter refectory a Latin text could be read:
Beside it was the grave stone of his first wife:
Henry of Schweinfurt
Henry of Schweinfurt ("de Suinvorde"; – 18 September 1017) was the Margrave of the Nordgau from 994 until 1004.
He was called the "glory of eastern Franconia" by his own cousin, the chronicler Thietmar of Merseburg.
Henry was the son of Berthold and Eilika (Eiliswintha or Eila) of Walbeck.
His father's parentage is not known with certainty, but he may have been a son of Arnulf, Duke of Bavaria.
Henry was Bavarian, whoever his grandfather.
Henry held a succession of countships after his father's death in 980.
He was appointed "marchio", like his father, of the Bavarian Nordgau in 994.
In 1003, he revolted against Henry II of Germany claiming that he had been promised the Duchy of Bavaria in return for his support.
The king said that the Bavarians had a right to elect their own duke.
Henry allied with Boleslaus I of Poland and Boleslaus III of Bohemia.
Nevertheless, his rebellion was quashed and he himself was briefly captive.
The king established the Diocese of Bamberg to prevent any further uprisings in the region.
The new diocese took over the secular authority of the margrave in the region of the Bavarian Nordgau.
Finally, it was only the joint persuasion of both his saecular and ecclesiastical overlords, Bernard I, Duke of Saxony, and Tagino, Archbishop of Magdeburg, that reconciled him to Henry in 1004.
Henry of Schweinfurt did subsequently gain new and old countships before his death in 1017.
He was buried at Schweinfurt.
Leo of Vercelli
Leo ("c".965–1026) was a German prelate who served as the Bishop of Vercelli from 999.
Born in Hildesheim, he was made an archdeacon by 998 and was appointed to the see of Vercelli as the candidate of the Emperor Otto III and Pope Sylvester II following the assassination of Bishop Peter.
He worked tirelessly for the extension of imperial authority in Italy during the reigns of Otto III, Henry II and Conrad II.
He worked for the imperial chancery, receiving the high rank and title of logothete.
Only a few of Leo's writings have survived, and only one of his epistles.
A notable Latin verse encomium written at Rome praises Otto III and Pope Gregory V. He also left behind an elegy of his diocesan predecessor and the so-called "Metrum leonis", a sometimes-rhyming adonic poem with fabulous and personal elements.
Otto III, Holy Roman Emperor
Otto III( June/ July 980 – 23 January 1002) was Holy Roman Emperor from 996 until his early death in 1002.
A member of the Ottonian dynasty, Otto III was the only son of the Emperor Otto II and his wife Theophanu.
Otto III was crowned as King of Germany in 983 at the age of three, shortly after his father's death in Southern Italy while campaigning against the Byzantine Empire and the Emirate of Sicily.
Though the nominal ruler of Germany, Otto III's minor status ensured his various regents held power over the Empire.
His cousin Henry II, Duke of Bavaria, initially claimed regency over the young king and attempted to seize the throne for himself in 984.
When his rebellion failed to gain the support of Germany's aristocracy, Henry II was forced to abandon his claims to the throne and to allow Otto III's mother Theophanu to serve as regent until her death in 991.
Otto III was then still a child, so his grandmother, Adelaide of Italy, served as regent until 994.
In 996, Otto III marched to Italy to claim the titles of King of Italy and Holy Roman Emperor, which had been left unclaimed since the death of Otto II in 983.
Otto III also sought to reestablish Imperial control over the city of Rome, which had revolted under the leadership of Crescentius II, and through it the papacy.
Crowned as Emperor, Otto III put down the Roman rebellion and installed his cousin as Pope Gregory V, the first Pope of German descent.
After the Emperor had pardoned him and left the city, Crescentius II again rebelled, deposing Gregory V and installing John XVI as Pope.
Otto III returned to the city in 998, reinstalled Gregory V, and executed both Crescentius II and John XVI.
When Gregory V died in 999, Otto III installed Sylvester II as the new Pope.
Otto III's actions throughout his life further strengthened imperial control over the Catholic Church.
From the beginning of his reign, Otto III faced opposition from the Slavs along the eastern frontier.
Following the death of his father in 983, the Slavs rebelled against imperial control, forcing the Empire to abandon its territories east of the Elbe river.
Otto III fought to regain the Empire's lost territories throughout his reign with only limited success.
While in the east, Otto III strengthened the Empire's relations with Poland, Bohemia, and Hungary.
Through his affairs in Eastern Europe in 1000, he was able to extend the influence of Christianity by supporting mission work in Poland and through the crowning of Stephen I as the first Christian king of Hungary.
Returning to Rome in 1001, Otto faced a rebellion by the Roman aristocracy, which forced him to flee the city.
While marching to reclaim the city in 1002, Otto suffered a sudden fever and died in Castle Paterno in Faleria at the age of 21.
With no clear heir to succeed him, his early death threw the Empire into political crisis.
Otto III, Duke of Pomerania
Otto III, Duke of Pomerania( 29 May 1444 – 7 September 1464) was a member of the House of Griffins and a Duke of Pomerania- Stettin.
Otto III, Duke of Brunswick-Lüneburg
Otto III, Duke of Brunswick- Lüneburg( 1296 – 19 August 1352) was Prince of Lüneburg from 1330 to 1352.
Popiel I
Popiel I was a legendary ruler of Poland, member of the Popielids dynasty.
According to the legends reported by Wincenty Kadłubek in his" Chronica seu originale regum et principum Poloniae", he was the son of Leszko III.
Father of Popiel II.
Ezzo, Count Palatine of Lotharingia
Ezzo( – 21 March 1034), sometimes called Ehrenfried, a member of the Ezzonid dynasty, was Count Palatine of Lotharingia from 1015 until his death.
As brother- in- law of Emperor Otto III, father of Queen Richeza of Poland and several other illustrious children, he was one of the most important figures of the Rhenish history of his time.

Question: Which country Otto Iii, Duke Of Swabia's father is from?
Answer: Germany