Counts of Blois Counts of Blois The County of Blois was originally centred on Blois, south of Paris, France. One of the chief cities, along with Blois itself, was Chartres. Blois was associated with Champagne Province, the House of Châtillon (who tended to reside in Blois), the Dukes of Brittany and, later, with the French royal family. Theobald I, Count of Blois served as Regent to Drogo, Duke of Brittany. Bertha of Blois, the daughter of Odo II of Blois, became Duchess Consort of Brittany through her marriage to Alan II, Duke of Brittany. Stephen Henry's son Stephen of Blois became King of
Joan, Countess of Blois Joan, Countess of Blois Joan of Châtillon ("Jeanne de Blois"; 1253? – 19 or 29 January 1291) was Countess of Blois from 1280 to 1291, and Lady of Avesnes. She was the daughter of John I, Count of Blois and Alix of Brittany, Dame de Pontarcy. Joan received the County of Chartres from her father during his life; she later sold these lands to Philip IV of France in 1286. She ceded the lordship of Avesnes to her cousin Hugh before her death. When she died in 1291 the other titles were left to him also. In 1263, Joanne married