Sophie of Bar was a daughter of Frederick II, Duke of Upper Lorraine

Frederick II, Duke of Upper Lorraine

Frederick II , son of Thierry I and Richilde von Blieskastel, daughter of Folmar III, Count in Bliesgau; was the count of Bar and duke of Lorraine, co-reigning with his father from 1019....

 (died 1026/1027) and Mathilda of Swabia. After her father died, she and her sister Beatrice

Beatrice of Bar

Beatrice of Bar was the marchioness of Tuscany from 1053 to her death as the wife of Boniface III of Tuscany...

 went to live with their mother's sister, Empress Gisela

Gisela of Swabia

Gisela of Swabia was the daughter of Herman II of Swabia and Gerberga of Burgundy. Both her parents were descendents of Charlemagne.-Life:...

She was Countess of Bar between 1033 and 1092, in succession of her childless brother, Duke Frederick III of Upper Lotharingia (died 1033). Her sister Beatrix (died 1076) married Boniface, margrave

Margrave

A margrave or margravine was a medieval hereditary nobleman with military responsibilities in a border province of a kingdom. Border provinces usually had more exposure to military incursions from the outside, compared to interior provinces, and thus a margrave usually had larger and more active...

 of Tuscany

Tuscany

Tuscany is a region in Italy. It has an area of about 23,000 square kilometres and a population of about 3.75 million inhabitants. The regional capital is Florence ....

, and remarried after his death with Godfrey III, Duke of Lower Lotharingia.

She married Count Louis of Montbéliard

County of Montbéliard

The County of Montbéliard , also known as County of Mömpelgard , was a feudal county of the Holy Roman Empire based around the city of Montbéliard in the present-day Franche-Comté region of France...

 (1019–1071 or 1073). Their son Count Thierry II of Bar-Montbéliard (1045–1105) succeeded to the county of Bar

Bar-le-Duc

Bar-le-Duc, formerly known as Bar, is a commune in the Meuse département, of which it is the préfecture . The department is in Lorraine in north-eastern France-Geography:...

.

Their other children were:

• Bruno
• Louis, cited in 1080
• Frederick (died 1092), marquis of Suze
• Sophie, married to Folmar, count of Froburg
• Beatrice (died 1092), married to Berthold I of Zähringen
  Zähringen
  Zähringen is the name of an old German family that founded a large number of cities in what are today Switzerland and Baden-Württemberg. While the junior line that first assumed the title Duke of Zähringen, a cadet branch of the House of Baden, became extinct in 1218, the senior line persists and...
  
   (died 1078), duke of Carinthia
• Mathilde, married to Hugh of Dagsburg (died 1089)

Sources

• Sophie de Bar (from the French Wikipédia)
• Sophie von Ober-Lothringen Gräfin von Sundgau-Pfirt (in German)