The fortifications were attacked and occupied by Odo II of Blois-Champagne in 1032 during the conflict after Rudolph's death.
Count | Blois | Count Basie | count | Count Dracula | The Count of Monte Cristo | Imperial Count | Count of Flanders | Count of Barcelona | Count Basie Orchestra | Gaspar de Guzmán, Count-Duke of Olivares | Count of Soissons | You Can Count on Me | Jean-Frédéric Phélypeaux, Count of Maurepas | Count Palatine | Count palatine | Count of Paris | John II, Count of Rietberg | Count of Nevers | count of Blois | William I, Count of Nassau-Dillenburg | Simon VI, Count of Lippe | Ramon Berenguer II, Count of Barcelona | Ramon Berenguer I, Count of Barcelona | Prince Gaston, Count of Eu | Peter II, Count of Savoy | Odo the Great | Juan Vicente de Güemes, 2nd Count of Revillagigedo | Henry of Blois | Gustav Horn, Count of Pori |
In 1010 king Robert II of France along with Odo II, Count of Blois went to Rome to secure an annulment from Robert's second wife, Constance of Arles, Adelaide-Blanche's daughter by William I. Pope Sergius IV, a friend to the Angevin counts, upheld the marriage and additionally upheld Adelaide's struggle to maintain control of lands at Montmajour Abbey.
In turn for his support in the conflict with Count Odo II of Blois he received the northern Maurienne part of the County of Vienne, then a fief of the Vienne archbishops, as well as territories in the Chablais region and in the Tarentaise Valley, a fief of the Tarentaise archbishops at Moûtiers.
When the House of Bar, which ruled in Upper Lorraine, became extinct in 1033, with the death of his cousin Frederick III, Conrad made him duke of both duchies, so that he could assist in the defence of the territory against Odo II, count of Blois, Meaux, Chartres, and Troyes (the later Champagne).
Guy II of Blois-Châtillon (died December 22, 1397), the youngest son of Louis I of Châtillon and Joan of Avesnes, was count of Blois and lord of Avesnes, Schoonhoven, and Gouda 1381–1397, and lord of Beaumont and Chimay.
He inherited some possessions in the region of Châteaudun and some historians have retrospectively called him "Count of Châteaudun."
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By a charter dated 25 October 876, Charles the Bald ceded Chaource, in Tonnerre, to Robert and Odo.
Theobald VI of Blois (French: Thibaut) (died 1218) was count of Blois and Clermont-en-Beauvaisis from 1205 to 1218.