John of Brienne, King of Jerusalem Emperor of Constantinople
1. John of Brienne, King of Jerusalem Emperor of Constantinople John — Berenguela of Leon. [Group Sheet]
Children:
Generation: 2
2. Jean de Brienne, Grand Butler of France 
(1.John1)Jean married Jeanne, Dame de Chateaudun 1251. Jeanne (daughter of Geoffrey, Viscount de Chateaudun VI and Clémence des Roches) was born Abt 1227; died Aft 1252. [Group Sheet]
Children:
- 3. Blanche de Brienne, Baroness Tingry was born Abt 1252, France; died Abt 1302.
- 3. Blanche de Brienne, Baroness Tingry
Generation: 3
3. Blanche de Brienne, Baroness Tingry (2.Jean2, 1.John1) was born Abt 1252, France; died Abt 1302. Blanche married William de Fiennes, Baron Tingry II 1269. William (son of Enguerrand de Fiennes, II and Isabelle de Conde) was born Abt 1250; died 11 Jul 1302, Battle of Courtrai. [Group Sheet]
Children:
- 4. Margaret de Fiennes was born Abt 1270; died 07 Feb 1332/33.
- 5. Joan de Fiennes was born Abt 1273; died Bef 26 Oct 1309.
- 6. Jean de Fiennes, Seigneur of Fiennes and Tingry was born Bef 1281, France; died 1340.
- 4. Margaret de Fiennes
Generation: 4
4. Margaret de Fiennes (3.Blanche3, 2.Jean2, 1.John1) was born Abt 1270; died 07 Feb 1332/33. Margaret married Edmund de Mortimer Sep 1285, Wigmore, Herefordshire, England. Edmund (son of Roger de Mortimer, Lord of Wigmore and Maud de Braose) was born 1251; died 17 Jul 1304, Wigmore, Herefordshire, England. [Group Sheet]
Children:
5. Joan de Fiennes (3.Blanche3, 2.Jean2, 1.John1) was born Abt 1273; died Bef 26 Oct 1309.
6. Jean de Fiennes, Seigneur of Fiennes and Tingry (3.Blanche3, 2.Jean2, 1.John1) was born Bef 1281, France; died 1340. Jean married Isabelle de Dampierre 1307. (daughter of Guy de Dampierre, Count of Flanders and Isabelle of Luxembourg) [Group Sheet]