Louis I, Duke of Bavaria
Ludwig I (23 December 1173 – 15 September 1231), called the Kelheimer or of Kelheim , since he was born and died at Kelheim, was the Duke of Bavaria from 1183 and Count Palatine of the Rhine from 1214.
He was a son of Otto I and his wife Agnes of Loon.
Ludwig was married to Ludmilla, a daughter of Duke Frederick of Bohemia.
Stan Marks
Stan Marks is an Australian writer and journalist.
He is the husband of Holocaust survivor Eva Marks.
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).
Elizabeth of Bohemia (1292–1330)
Elizabeth of Bohemia( 20 January 1292 – 28 September 1330) was a princess of the Bohemian Přemyslid dynasty who became queen consort of Bohemia as the first wife of King John the Blind.
She was the mother of Emperor Charles IV, King of Bohemia.
Jon Leach
Jonathan Leach( born April 18, 1973) is a former professional tennis player from the United States.
He is the husband of Lindsay Davenport.
Stan Rice
Stan Rice( November 7, 1942 – December 9, 2002) was an American poet and artist.
He was the husband of author Anne Rice.
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.
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.
Ludmilla of Bohemia
Ludmilla of Bohemia (died 14 August 1240) was a daughter of Frederick, Duke of Bohemia, and his wife, Elizabeth of Hungary.
Ludmilla was a member of the Přemyslid dynasty.
She was Duchess consort of Bavaria by her marriage to Louis I, Duke of Bavaria.
Otto II, Duke of Bavaria
Otto II of Bavaria( 7 April 1206 in Kelheim – 29 November 1253) known as Otto the Illustrious was the Duke of Bavaria and Count Palatine of the Rhine( see Electorate of the Palatinate).
He was the son of Ludwig I and Ludmilla of Bohemia and a member of the Wittelsbach dynasty.

Question: What is the place of birth of Ludmilla Of Bohemia's husband?
Answer: Kelheim