Title: Judith of Swabia
Content:  Judith of Swabia (Sváb Judit, Judyta Szwabska; Summer 1054 – 14 March ca. 1105?), a member of the Salian dynasty, was the youngest daughter of Emperor Henry III from his second marriage with Agnes of Poitou. By her two marriages she was Queen of Hungary from 1063 to 1074 and Duchess of Poland from 1089 to 1102.
Title: Judith of Bavaria, Duchess of Swabia
Content:  On an unknown date between 1119 and 1121, she married as his first wife, Frederick II, Duke of Swabia (1090 – 6 April 1147); this dynastic marriage united the House of Welf and the House of Hohenstaufen, the two most powerful and influential families in Germany. The Historia Welforum specified that Judith married Friderico Suevorum duci, but did not mention the date. In 1125, her father initially supported the candidacy of her husband to succeed Emperor Henry V as King of Germany, however he eventually switched his support to Lothar III, Holy Roman Emperor. The defection of Judith's father created an enmity between the Welfs and the Swabians that would have far-reaching consequences in Germany which would last throughout the 12th century. It is not known how this affected relations between Judith and her husband. It is curious to note that no further children were born to the couple after the birth of their daughter Bertha in 1123. She died on 27 Aug 1130 and was buried at Waldburg in Heiligen Forst, Alsace. Shortly after Judith's death Frederick married as his second wife, Agnes of Saarbrücken.
Title: Judith of Bavaria, Duchess of Swabia
Content:  Judith was born 19 May 1100, the eldest daughter of Henry IX, Duke of Bavaria and Wulfhilde of Saxony, daughter of Magnus, Duke of Saxony and Sophia of Hungary, and thereby a member of the powerful German House of Welf. She had three brothers Henry X, Duke of Bavaria, Conrad, and Welf; and three sisters, Sophia, Matilda, and Wulfhild. The Historia Welforum names in order Iuditham, Mahtildem, Sophium, and Wulfildem as the four daughters of Henricus dux ex Wulfilde. This is evidence that Judith was the eldest daughter. She had in addition to her seven legitimate siblings, one half-brother, Adalbert, born of her father's relationship with an unnamed mistress.
Title: Judith of Swabia
Content:  In 1089, Judith married Duke Władysław Herman of Poland. This union considerably benefited German-Polish relations; on the occasion of the wedding, Emperor Henry IV commissioned to St. Emmeram's Abbey in Regensburg the creation of Gospel Books to the Polish court, now kept in the library of the Wawel Cathedral chapter in Kraków. After her marriage, Judith changed her name to Sophia, perhaps to distinguish herself from Władysław I's first wife, Judith of Bohemia. Judith of Swabia's daughters with Władysław were Sophia (who married Prince Yaroslav Sviatopolkovich of Vladimir-Volynia), Agnes (later abbess of Quedlinburg and Gandersheim), possibly Adelaide (who married Margrave Diepold III of Vohburg), and the wife of a Polish lord whose name is not known. Judith 
Title: Judith of Bavaria, Duchess of Swabia
Content:  Judith of Bavaria, Duchess of Swabia (19 May 1100 – 27 Aug 1130) was a Duchess of Swabia by marriage to Frederick II, Duke of Swabia. She was the mother of Frederick I, Holy Roman Emperor, known to history as "Barbarossa".
Title: Judith of Hohenstaufen
Content:  Judith was a daughter of Duke Frederick II of Swabia (1090–1147) and his second wife Agnes of Saarbrücken, thereby a younger half-sister of Emperor Frederick Barbarossa (1122–1190). She first appeared in contemporary sources in 1150, upon her marriage with Landgrave Louis II of Thuringia. This wedlock was intended to cement the relationship between the Thuringian Ludovingians and the imperial House of Hohenstaufen, to strengthen Emperor Barbarossa in his fierce conflict with Duke Henry the Lion and the House of Welf. When in 1168 her husband reconciled with Henry the Lion, Judith began the construction of Runneburg Castle in Weißensee. The neighbouring Counts of Beichlingen objected, 
Title: Judith of Schweinfurt
Content:  Her parents were Henry of Schweinfurt (d. 1017), margrave in the Bavarian Nordgau, and his wife Gerberga of Henneberg. Margrave Henry and his father Berthold may have been descendants of Duke Arnulf of Bavaria and related to the Luitpolding dynasty. Berthold's brother (or nephew) Margrave Leopold I of Austria became progenitor of the Younger House of Babenberg. She was raised at the nunnery her family had founded in Schweinfurt.
Title: Judith of Babenberg
Content:  Malaspina. She was a daughter of Margrave Leopold III of Austria (1073&ndash;1136), from his second marriage with Agnes (1072&ndash;1143), the only daughter of the Salian emperor Henry IV. She thereby was a niece of Emperor Henry V, the chronicler Otto of Freising was one of her older brothers. King Conrad III of Germany was her half-brother from her mother's first marriage with the Hohenstaufen duke Frederick I of Swabia; Emperor Frederick Barbarossa was her nephew. By his marriage, Judith's father Leopold had climbed into the first row of Imperial princes. In 1125 he even was one of the possible candidates in the election as King of the Romans, he nevertheless forwent in favour of his stepson Duke Frederick II of Swabia. About 1133, Judith married the Aleramici 
Title: Judith of Bavaria, Duchess of Swabia
Content: Frederick I Barbarossa, Holy Roman Emperor (1122 – 10 June 1190), married on 9 June 1156 Beatrice I, Countess of Burgundy, by whom he had 12 children. ; Bertha (also called Judith) of Swabia (1123 – 18 October 1194/25 March 1195), married in 1138 Matthias I, Duke of Lorraine, by whom she had seven children. She had two children:
Title: Judith of Swabia
Content:  Born probably at the Imperial Palace of Goslar, Judith was the youngest of the six children born to Emperor Henry III and Empress Agnes. Soon after her birth on 9 April 1054, Judith was betrothed to Philip, eldest son of King Henry I of France. However, after the death of Emperor Henry III on 5 October 1056, with Empress Agnes acting as regent on behalf of her minor son, King Henry IV, the engagement was broken in September 1058, when a peace treaty was concluded with King Andrew I of Hungary. Emperor Henry III had waged two unsuccessful campaigns against Hungary in 1051 and 1052, whereafter Pope Leo IX arranged an agreement. As a part of the new alliance, Judith was engaged to the Hungarian king's son Solomon at the Bavarian court in Regensburg. When King Andrew I died in 1060, his widow and sons had to take refuge in Germany. Nevertheless, with the support of his powerful brother-in-law, Solomon could recover the Hungarian throne after the death of his uncle Béla I in 1063 and soon after married with Judith in Székesfehérvár.

Question: Who is the father of Judith of Swabia?
Answer: Henry III.