• Born: 1214, Winchester Castle, Hampshire, England
• Married: 20 Jul 1235
• Died: 1 Sep 1241, Foggia near Naples, Italy

  Research Notes:

Matthew Paris records her marriage, specifying that she was the sister of King Henry III. The Annals of Dunstable record that “Fredericus imperator Alemanniæ” married “Ysabellam filiam Johannis regis Angliæ” in 1235, her dowry being 30,000 marcs of silver. The Annales Erphordenses record the marriage "1235 XVII Kal Aug" at Worms of "sororem Regis Anglie" and the emperor. Her marriage was arranged by her future husband to drive a wedge between England and the Welf faction in Germany, long time allies. She was granted the castle of Monte Sant'Angelo by her husband on her marriage, and crowned empress 20 Jul 1235 at Worms Cathedral. After her marriage, her husband confined her to one of his castles in Sicily where she was guarded by eunuchs.

The Annales Londonienses record the death in 1241 of "Isabella imperatrix, soror regis Angliæ". The Annals of Tewkesbury record the death “circa festum sancti Nicholai” in 1241 of “Johanna imperatrix” and her burial “apud Barensem urbem”. She died in childbirth. ¹