Question: Who is the sibling-in-law of Ida Of Lorraine?

Knowledge 1: Ida of Lorraine
Ida of Lorraine (also referred to as Blessed Ida of Boulogne)(c. 1040 – 13 April 1113) was a saint and noblewoman.She was the daughter of Godfrey III, Duke of Lower Lorraine and his wife Doda.Ida's grandfather wasGothelo I, Duke of Lorraine and Ida's brother was Godfrey IV, Duke of Lower Lorraine. [SEP] Knowledge 2: Godfrey IV, Duke of Lower Lorraine
Godfrey IV (died 26 or 27 February 1076), known as the Hunchback, was a son of Godfreythe Bearded, whom he succeeded as Duke of Lower Lorraine in 1069, and Doda.In the year of his succession, he married Margravine Matilda of Tuscany, daughter of his stepmother Beatrice of Bar, and thus became margrave of Tuscany.Godfrey and Matilda had only one child, Beatrice, who was born in 1071 and died the same year.From 1071 on, Godfrey lived apart from his wife.The two spouses were on opposite sides in the Investiture Controversy:Matilda was a partisan of Pope Gregory VII and Godfrey of Emperor Henry IV.He warred on Henry's behalf against Magnus, Duke of Saxony, in 1075 and on that of the bishop of Utrecht in 1076 against Dirk V of Holland and Robert I of Flanders.He was assassinated by spear in Vlaardingen while "answering the call of nature".Despite Matilda's opposition he nominated his nephew Godfrey of Bouillon to succeed him, but the emperor instead appointed his own son, Conrad.Godfrey of Bouillon succeeded eventually in 1087 and gained fame on the First Crusade.
Knowledge 1: Godfrey IV, Duke of Lower Lorraine
Godfrey IV (died 26 or 27 February 1076), known as the Hunchback, was a son of Godfreythe Bearded, whom he succeeded as Duke of Lower Lorraine in 1069, and Doda.In the year of his succession, he married Margravine Matilda of Tuscany, daughter of his stepmother Beatrice of Bar, and thus became margrave of Tuscany.Godfrey and Matilda had only one child, Beatrice, who was born in 1071 and died the same year.From 1071 on, Godfrey lived apart from his wife.The two spouses were on opposite sides in the Investiture Controversy:Matilda was a partisan of Pope Gregory VII and Godfrey of Emperor Henry IV.He warred on Henry's behalf against Magnus, Duke of Saxony, in 1075 and on that of the bishop of Utrecht in 1076 against Dirk V of Holland and Robert I of Flanders.He was assassinated by spear in Vlaardingen while "answering the call of nature".Despite Matilda's opposition he nominated his nephew Godfrey of Bouillon to succeed him, but the emperor instead appointed his own son, Conrad.Godfrey of Bouillon succeeded eventually in 1087 and gained fame on the First Crusade. [SEP] Knowledge 2: Frederick II, Count of Vaudémont
Frederick( Ferry) II of Lorraine- Vaudémont( – 31 August 1470), was Count of Vaudémont and Lord of Joinville from 1458 to 1470.He was son of Antoine of Lorraine, Count of Vaudémont and Lord of Joinville and Marie of Harcourt, Countess of Harcourt and Aumale, as well as Baroness of Elbeuf.He is sometimes numbered Frederick V by continuity with the Dukes of Lorraine.In 1445, he married his cousin Yolande of Anjou( 1428 – 1483), daughter of René I of Anjou,( King of Naples, Duke of Anjou, of Bar and of Lorraine, Count of Provence), and of Isabelle, Duchess of Lorraine.This marriage put an end to the litigation which existed between the fathers of the bride and groom, in connection with the succession of the Duchy of Lorraine.They had six children:In 1453 his father- in- law honoured him with the command of the troops that he sent to the Dauphin Louis to help him to fight the Duke of Savoy.In 1456 René entrusted the government of the Duchy of Bar to Frederick, and in 1459 granted him the honorary title of Lieutenant- General of Sicily.
Knowledge 1: Ida of Lorraine
Ida of Lorraine (also referred to as Blessed Ida of Boulogne)(c. 1040 – 13 April 1113) was a saint and noblewoman.She was the daughter of Godfrey III, Duke of Lower Lorraine and his wife Doda.Ida's grandfather wasGothelo I, Duke of Lorraine and Ida's brother was Godfrey IV, Duke of Lower Lorraine. [SEP] Knowledge 2: Henry II, Duke of Lorraine
Henry II( French:" Henri II"; 8 November 1563 – 31 July 1624), known as" the Good(" le Bon, was Duke of Lorraine from 1608 until his death.Leaving no sons, both of his daughters became Duchesses of Lorraine by marriage.He was a brother- in- law of Henry IV of France.

Answer: Matilda of Tuscany