Eustace I, Count of Boulogne
Eustace I, Count of Boulogne, was a nobleman and founder of the Boulogne branch of the House of Flanders.
He held the county of Boulogne from 1024 until his death in 1049.
Eustace III, Count of Boulogne
Eustace III (died c. 1125) was the count of Boulogne from 1087, succeeding his father Count Eustace II.
His mother was Ida of Lorraine.
In 1088, Eustace supported the rebellion against William II of England in favour of Robert Curthose.
Eustace participated in the First Crusade of 1096 along with his brothers Godfrey of Bouillon (duke of Lower Lotharingia) and Baldwin of Boulogne.
It is unclear whether he travelled eastward with his brother Godfrey's or Robert Curthose's army.
His contingent included Hugh II of Saint-Pol and his son Engelrand, Eustace I Granarius, lord of Sidon and Caesarea, Fulk of Guînes, and Hugh of Robecq (Rebecques), lord of Hebron.
Throughout the crusade Eustace assisted Godfrey.
Eustace was present at the Siege of Nicaea (May–June 1097), helped rescue Bohemund of Taranto's beleaguered troops at the Battle of Dorylaeum (July 1, 1097), defeated an enemy ambush during the Siege of Antioch and was one of the commanders during the capture of Antioch on June 3, 1098.
Eustace was a member of the council held at Ruj on January 4, 1099, mediating in the conflict over the control of Antioch between Bohemund of Taranto and Raymond IV of Toulouse.
Early December 1098 Eustace joined Raymond's attack on Maarrat al-Nu'man and an attack on Nablus in July 1099.
He gained notoriety for his actions during the Siege of Jerusalem fighting relentlessly from a siege tower along with his brother Godfrey and the warriors they commanded.
They were among the first to breach Jerusalem's city walls and participated in the ensuing massacre.
Finally Eustace commanded a division of the crusader army during the Battle of Ascalon.
While his brothers stayed in the Holy Land, Eustace returned to administer his domains.
To commemorate Eustace's crusading adventures the mint at Boulogne struck silver coins with a lion above the walls of Jerusalem stamped on the obverse.
Eustace married Mary, daughter of King Malcolm III of Scotland and Saint Margaret of Scotland.
Eustace and Mary had one daughter:
When his youngest brother king Baldwin I of Jerusalem died in 1118, the elderly Eustace was offered the throne.
Eustace was at first uninterested, but was convinced to accept it; he travelled all the way to Apulia before learning that a distant relative, Baldwin of Bourcq, had been crowned in the meantime.
Eustace returned to Boulogne and died about 1125.
On his death the county of Boulogne was inherited by his daughter, Matilda, and her husband Stephen de Blois, count of Mortain, afterwards king of England.
Eustace founded the Cluniac house of Rumilly and was patron of the Knights Templar.
Matilda II, Countess of Boulogne
Mahaut or Matilda II of Boulogne( also known as" Mathilde Maud de Dammartin"; 1202 – January 1259) was Countess of Boulogne in her own right and Queen of Portugal by marriage to King Afonso III from 1248 until their divorce in 1253.
She was the daughter of Ida, Countess of Boulogne and her husband and co-ruler Renaud, Count of Dammartin.
She succeeded her mother as Countess of Boulogne in 1216.
She was the great- granddaughter of King Stephen of England.
Arnulf III, Count of Boulogne
Arnulf III of Boulogne( † 990) was a son of Arnulf II, Count of Boulogne.
He succeeded his father as count of Boulogne from 972 to 990.
On his death his lands were divided between his three sons:
Ida, Countess of Boulogne
Ida of Boulogne( c. 1160 – 1216) was suo jure Countess of Boulogne from 1173 until her death.
Mary of Guelders
Mary of Guelders( c. 1434 – 1 December 1463) was the queen consort of Scotland by marriage to King James II of Scotland.
She served as regent of Scotland from 1460 to 1463.
Matilda of Boulogne, Duchess of Brabant
Matilda of Boulogne
( 1170 – 16 October 1210) was the younger daughter of Matthew, Count of Boulogne and Marie I, Countess of Boulogne.
Matilda became Duchess of Brabant by her marriage to Henry I, Duke of Brabant.
Matilda's parents' marriage was annulled the year she was born and her mother became a Benedictine nun at St. Austrebert, Montreuil and died in 1182.
Matilde's father continued to reign as Count of Boulogne until his death in 1173, when her older sister Ida became countess.
At the age of nine, Matilda married Henry I, Duke of Brabant, in 1179.
The couple went on to have: Matilde died in 1210 or 1211.
She was buried at St. Peter's in Leuven.
Arnulf II, Count of Boulogne
Arnulf II of Boulogne( † 972) was a son of Count Adalolf.
He succeeded as Count of Boulogne in 964 after the death of his uncle Arnulf I, and held it until his own death.
He was the father of Arnulf III, Count of Boulogne.
He is the ancestor of Ruler of Jerusalem Godfrey of Bouillon.
Mary of Scotland, Countess of Boulogne
Mary of Scotland (1082–1116) was the younger daughter of Malcolm III of Scotland and his second wife, Margaret of Wessex.
Mary was a member of the House of Dunkeld by birth, and was Countess of Boulogne by marriage.
In 1086, Mary and her sister, Matilda, were sent by their parents to Romsey.
Their maternal aunt, Christina, was abbess there.
The girls spent their early life at the monastery with their aunt, where they also received part of their education.
Some time before 1093, they went to Wilton Abbey, which also had a reputation as a centre of learning, to finish their education.
Matilda received many proposals for marriage but refused them all for the time being.
Matilda finally left the monastery in 1100 to marry King Henry I of England.
The marriage was controversial because it was not clear whether the girls had been veiled as nuns.
Mary herself left the abbey in 1096.
Matilda wanted her to also marry, so Henry I arranged a match with Eustace III, Count of Boulogne.
The couple had a daughter, Matilda, who succeeded Eustace and later became Queen of England.
Mary died in 1116, nine years before her husband.
She was buried at the Cluniac abbey at Bermondsey.
Baldwin II, Count of Boulogne
Baldwin II of Boulogne was a son of Arnulf III, Count of Boulogne, whom he succeeded as count of Boulogne.

Question: Where did Mary Of Scotland, Countess Of Boulogne's husband die?
Answer: Rumilly