Ludmila (wife of Mieszko I Tanglefoot)
Ludmila( d. October 20 after 1210) was the wife of Mieszko I Tanglefoot.
Her origins are disputed.
Mieszko I Tanglefoot married Ludmila between 1170- 1178.
Given her name, scientists think that Ludmila came from Bohemia, a member of the Přemyslid dynasty, since this was one of the only families to have women in it called Ludmila.
However researchers have different opinions.
It was suggested that she was daughter of Otto III, Duke of Olomouc and his wife Durantia, probably the daughter of Mstislav I of Kiev by his second wife Liubava Dmitrievna.
There was also a minority hypothesis that Ludmila was daughter of Soběslav I, Duke of Bohemia, Conrad II, Duke of Znojmo or Vladimir, Duke of Olomouc.
Ludmilla contributed to the foundation of the Norbertine monastery in Rybnik, who was later transferred to Czarnowąsy.
Mieszko and Ludmila had the following children:
Soběslav I, Duke of Bohemia
Soběslav I (also "Sobeslaus"; c.1075 – 14 February 1140) was Duke of Bohemia from 1125 until his death.
He was a member of the Přemyslid dynasty, the youngest son of Vratislaus II (d. 1092), by his third wife Świętosława of Poland.
Lukarta of Bogen
Lukarta of Bogen( born 1075) was a Duchess consort of Bohemia, married to Bretislaus II, Duke of Bohemia.
Anne of Bohemia, Duchess of Austria
Anne of Bohemia( 27 March 1323 – 3 September 1338), also known as" Anna of Luxembourg", was a daughter of John of Bohemia and his first wife, Elizabeth of Bohemia.
Anne was a member of the House of Luxemburg.
Anne of Bohemia (1290–1313)
Anne of Bohemia( 1290 –1313) was the eldest surviving daughter of Wenceslaus II of Bohemia and Poland and his first wife Judith of Habsburg.
Her siblings included Elisabeth of Bohemia and Wenceslaus III of Bohemia.
Margaret of Bohemia, Duchess of Bavaria
Margaret of Bohemia( 1313–1341) was the daughter of King John of Bohemia by his first wife Elisabeth of Bohemia( 1292–1330).
Adelaide of Hungary (d. 1140)
Adelaide of Bohemia( 1105/07 – 15 September 1140) was a daughter of Prince Álmos of Hungary and his wife Predslava of Kiev.
Adelaide's father was a son of King Géza I of Hungary and was Duke and later King of East Slavonia.
Adelaide married Soběslav I, Duke of Bohemia.
They had at least five children:
Świętosława of Poland
Świętosława of Poland ((c. 1046-1048 – 1 September 1126)) was the third wife of Duke (later King)
Vratislaus II of Bohemia and the first Queen of Bohemia as of 1085.
Wenceslaus II, Duke of Bohemia
Wenceslaus II( 1137 – after 1192) was the son of Soběslav I and brother of Soběslav II.
He was the duke of Bohemia following Conrad II in 1191.
He was the duke of Olomouc and Brno, but was deposed by Duke Frederick in 1179 and exiled.
He returned from exile after thirteen years on Conrad's death.
Wenceslaus was deposed after a reign of three months by Frederick's half- brother Ottokar.
He tried to flee to the Emperor Henry VI, but was captured by the margrave of Lusatia, who imprisoned him until his death.
Elizabeth of Hungary, Duchess of Bohemia
Elizabeth of Hungary( 1145- 1189), was a Duchess consort of Bohemia, married to Frederick, Duke of Bohemia.
Her parents were King Géza II of Hungary and Euphrosyne of Kiev.
She served as regent of Bohemia twice in the absence of her spouse.

Question: What is the date of death of Soběslav I, Duke Of Bohemia's mother?
Answer: 1 September 1126