Isabelle married JOHN I (KING OF ENGLAND) Plantagenet on 29 Aug 1189 in Marlborough Castle, Marlborough, Wiltshire, England. JOHN (son of HENRY II (KING OF ENGLAND) Plantagenet and Eleanor Acquitaine (maid. name Duchess of Aquitaine Queen of France Queen of England)) was born on 24 Dec 1166 in Beaumont Palace, Kings Manor House, Oxford, Oxfordshire, England; died on 19 Oct 1216 in Newark Castle, Newark-on-Trent, Nottinghamshire, England. [Group Sheet] [Family Chart]

Isabelle married Hubert DeBurgh, 1st Earl of Kent in Sep 1217 in London, Middlesex, England. Hubert was born in 1160 in Kent, England; died on 5 May 1243 in Banstead, Surrey, England. [Group Sheet] [Family Chart]

Isabelle married Geoffrey FitzGeoffrey 'Magna Carta Baron' DeMandeville, 2nd Earl of Essex on 20 Jan 1214 in London, Middlesex, England. Geoffrey was born in 1191 in Essex, , England; died on 23 Feb 1216 in London, Middlesex, England. [Group Sheet] [Family Chart]