Question: Who is Gisela Of Hungary's mother-in-law?

Knowledge 1: Gisela of Hungary
Gisela of Hungary (or Gisele, Gizella and of Bavaria; 985 – 7 May 1065) was the first queen consort of Hungary by marriage to Stephen I of Hungary, and the sister of Henry II, Holy Roman Emperor.She has been beatified by the Roman Catholic church. [SEP] Knowledge 2: Stephen I of Hungary
Stephen I, also known as King Saint Stephen (975 – 15 August 1038 AD), was the last Grand Prince of the Hungarians between 997 and 1000 or 1001, and the first King of Hungary from 1000 or 1001 until his death in 1038.The year of his birth is uncertain, but many details of his life suggest that he was born in or after 975 in Esztergom.At his birth, he was given the pagan name Vajk.The date of his baptism is unknown.He was the only son of Grand Prince Géza and his wife, Sarolt, who was descended from the prominent family of the "gyulas".Although both of his parents were baptized, Stephen was the first member of his family to become a devout Christian.He married Gisela of Bavaria, a scion of the imperial Ottonian dynasty.After succeeding his father in 997, Stephen had to fight for the throne against his relative, Koppány, who was supported by large numbers of pagan warriors.He defeated Koppány mainly with the assistance of foreign knights, including Vecelin, Hont and Pázmány, but also with help from native lords.He was crowned on 25 December 1000 or 1 January 1001 with a crown sent by Pope Sylvester II.In a series of wars against semi-independent tribes and chieftainsincluding the Black Hungarians and his uncle, Gyula the Youngerhe unified the Carpathian Basin.He protected the independence of his kingdom by forcing the invading troops of Conrad II, Holy Roman Emperor, to withdraw from Hungary in 1030.Stephen established at least one archbishopric, six bishoprics and three Benedictine monasteries; thus the Church in Hungary developed independently of the archbishops of the Holy Roman Empire.He encouraged the spread of Christianity with severe punishments for ignoring Christian customs.His system of local administration was based on counties organized around fortresses and administered by royal officials.Hungary, which enjoyed a lasting period of peace during his reign, became a preferred route for pilgrims and merchants traveling between Western Europe and the Holy Land or Constantinople.He survived all of his children.He died on 15 August 1038 and was buried in his new basilica, built in Székesfehérvár and dedicated to the Holy Virgin.His death caused civil wars which lasted for decades.He was canonized by Pope Gregory VII, together with his son, Emeric, and Bishop Gerard of Csanád, in 1083.Stephen is a popular saint in Hungary and the neighboring territories.In Hungary, his feast day (celebrated on 20 August) is also a public holiday commemorating the foundation of the state, known as State Foundation Day.
Knowledge 1: Ebba Eriksdotter Vasa
Ebba Eriksdotter Vasa (circa 1491 – 21 November 1549) was a Swedish noblewoman.She was the mother of Queen Margaret Leijonhufvud and the second cousin and mother-in-law of King Gustav Vasa. [SEP] Knowledge 2: Baroness Gösta von dem Bussche-Haddenhausen
Baroness Gösta von dem Bussche- Haddenhausen( 26 January 1902 – 13 June 1996) was the mother of Prince Claus of the Netherlands, who was the Prince Consort of Queen Beatrix of the Netherlands, thus making her the mother- in- law of the former Dutch Queen.She is also the paternal grandmother of King Willem- Alexander of the Netherlands, who is the current Dutch King.
Knowledge 1: Ebba Eriksdotter Vasa
Ebba Eriksdotter Vasa (circa 1491 – 21 November 1549) was a Swedish noblewoman.She was the mother of Queen Margaret Leijonhufvud and the second cousin and mother-in-law of King Gustav Vasa. [SEP] Knowledge 2: Maria Thins
Maria Thins( c. 1593 – 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family.

Answer: Sarolt