Eustace II, (c. 1015-1020 – c. 1087) was count of Boulogne from 1049-1087, fought on the Norman side at the Battle of Hastings, and afterwards received a large honour in England. He was the son of Eustace I. His first wife was Goda, daughter of the English king Æthelred the Unready, and sister of Edward the Confessor. Goda died circa 1047, and he quickly married again (about 1049).
Eustace III, was a count of Boulogne, successor to his father Count Eustace II of Boulogne. His mother was Ida of Lorraine. His father Eustace II appeared at the Battle of Hastings in 1066 as an ally of William the Conqueror, and is listed as a possible killer of Harold II; he is also believed to have given William his own horse after the duke's was killed under him by Gyrth, brother of Harold. Eustace III succeeded as Count of Boulogne in 1087.
Eustace IV (c. 1130 – 17 August 1153) was a Count of Boulogne and the son and heir of King Stephen of England. He became the Heir Apparent to his father's lands by the death of an elder brother before 1135, and inherited Boulogne through his mother, Matilda of Boulogne. In 1137, he did homage for Normandy to Louis VII of France, whose sister, Constance, he subsequently married in 1140 (as a widow she remarried to Count Raymond V of Toulouse).
Baldwin II (c. 865 – September 10, 918), nicknamed Calvus (the Bald) was the second count of Flanders. He was also hereditary abbot of St. Bertin from 892 till his death. He was the son of Baldwin I of Flanders and Judith, a daughter of Charles the Bald. Through his mother, Baldwin was a descendant of Charlemagne. The early years of Baldwin's rule were marked by a series of devastating Viking raids. Little north of the Somme was untouched.
Arnulf LeVieux, Count of Flanders (c. 890 – March 28, 965), called the Great, was the third count of Flanders. Arnulf was the son of count Baldwin II of Flanders and Ælfthryth, daughter of Alfred the Great. He was named after his distant ancestor, Saint Arnulf of Metz; this was intended to emphasize his family's descent from the Carolingian dynasty.
Philip of Burgundy (November 10, 1323 - August 10, 1346) was Count of Auvergne and Boulogne and the only son and heir of Eudes IV, Duke of Burgundy by his wife, Joan of France, daughter of king Philip V and Jeanne II, Countess of Burgundy. He married Joanna, Countess of Auvergne and Boulogne in c. 1338. Philip was supposed to inherit the Duchy of Burgundy, County of Artois and Palatine County of Burgundy, but he died prematurely by a kick of a farmer's horse, that caught him in the head.
Philip I of Burgundy, also Philip II of Palatine Burgundy, Philip II of Boulogne, Philip III of Artois, Philip III of Boulogne, nicknamed Philip of Rouvres (1346 – November 21, 1361) was Duke of Burgundy from 1350 until his death. Philip was the only son of Philip of Burgundy, heir to the Duchy of Burgundy, and Joanna, countess of Auvergne and Boulogne. He succeeded his grandfather when he was only three years old.
The county of Boulogne was a historical region in the Low Countries. It consisted of a part of the present-day French département of the Nord, in parts of which there is still a Flemish-speaking minority. In Roman times, Boulogne was situated in the Roman provinces of Belgica and inhabited by Celtic tribes, until Germanic peoples replaced them and made an end to roman imperial rule. Its most important city was Boulogne-sur-Mer. Today the historic county of is an integral part of France.
Ida of Boulogne (c. 1160 – 1216), was Countess of Boulogne. She was the eldest daughter of Matthew of Alsace by Marie, Countess of Boulogne. Her maternal grandparents were King Stephen of England and Matilda I of Boulogne. Her mother had been placed in a convent, but was removed in order to marry Matthew. As a consequence, her parent's marriage was rather controversial and they finally divorced in 1170. Her father continued to rule until his death in 1173, when she succeeded.
William I of Blois (c.1137 – 11 October 1159) was Count of Boulogne (1153-1159) and Earl of Surrey (1153-1159). He was the third son of King Stephen of England and Matilda of Boulogne. When his elder brother, Eustace IV of Boulogne, died in 1153, William was passed over in the succession to England. His father instead conceded the throne to the young Henry Plantagenet.
Marie of Boulogne (1136 – 1182 in St Austrebert, Montreuil, France) was the Countess of Boulogne from 1159 to 1170. Marie was born to King Stephen of England and his wife Matilda I, Countess of Boulogne. At an early age, she was apparently placed in a convent, but she became her childless brother William's heir in 1159.
Mahaut or Matilda II of Boulogne (also known as Mathilde, Maud de Dammartin; died 1260) was sovereign Countess of Boulogne, 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.
Arnold II is a Count of Boulogne identified by Morton and Muntz (page xxxi note 7) as the one slain in battle by Count Enguerrand I of Ponthieu. Frank Barlow (page xliii note 125) prefers to retain the traditional identification of the slain count as Baldwin I of Boulogne. However, he admits that the identification is "uncertain. " In any case, the widow (Adelvie?) of Baldwin / Arnold then married Count Enguerrand I.
Matthew of Alsace (c.1130-1173) was the second son of Thierry, Count of Flanders and Sibylla of Anjou. By marriage to Marie de Boulogne, he became Count of Boulogne, in 1160. They were divorced in 1170, but he continued as Count until his death. Their elder daughter was Ida, Countess of Boulogne. Their other daughter, Maud of Boulogne, married Henry I, Duke of Brabant. He was a supporter of Henry the Young King, and received lands in England.