Baldwin I of Constantinople, Emperor of Constantinople

Paternal Side

• Baldwin V of Hainault Count of Hainault ( 1150 - 1195  (45 years))

• Baldwin IV of Mons Count of Hainault ( 1108 - 1171  (63 years))
• Alice of Namur ( - Yes, date unknown)

• Baldwin III of Hainault Count of Hainault ( 1088 - 1120  (32 years))
• Yolande of Guelders (Yolande of Wassenberg) ( - Yes, date unknown)
• Godfrey of Namur Count of Namur ( - 1139)
• de Luxembourg, Ermesind of Luxemburg ( - Yes, date unknown)

Maternal Side

• Margaret I Countess of Flanders ( Abt 1145 - 1194  (~ 49 years))

• de Lorraine, Thierry (Theodoric) of Alsace Count of Flanders ( Abt 1099 - 1168  (~ 69 years))
• Sybil of Anjou ( Abt 1114 - 1165  (~ 51 years))

• de Lorraine, Thierry (Theodoric) II, the Valiant Duke of Lorraine ( - 1115)
• Gertrude of Flanders ( 1080 - 1117  (37 years))
• Fulk V The Younger of Anjou Count of Anjou ( - 1143)
• Ermengard of Maine ( - Yes, date unknown)