House of Blois

Cadet Branches
House of Sully
Lords of Sully
Issued from eldest son of Stephen II
Disinherited in 1107 after which they took the name of their possession in Sully
House of Champlitte
Lords of Champlitte
Princes of Achaea
Issued from 3rd son of Theobald III from his 2nd marriage
House of Blois-Champagne
Counts of Champagne, Troyes, Blois and Chartres
Kings of Navarre
Issued from 2nd son of Stephen II

Personal Arms
Stephen II of Blois
Count of Blois and Chartres
Attributed arms
Stephen of Blois
Count of Boulogne jure uxoris
King of England
1135–1141
Attributed arms
4th son of Stephen II
William de Blois
Count of Boulogne and Mortain
Earl of Surrey
Son of Stephen of Blois