John Plantagenet of Cornwall
M, b. 31 January 1232, d. 22 September 1233
| Father | Richard Plantagenet 1st Earl of Cornwell b. 5 Jan 1209, d. 2 Apr 1272 |
| Mother | Isabel Marshall b. 9 Oct 1200, d. 17 Jan 1240 |
John was born on Saturday, 31 January 1232 in Marlow, Buckinghamshire, England. John departed this life on Thursday, 22 September 1233 in Marlow, Buckinghamshire, England. He was buried at Reading, Berkshire, England, in the Reading Abbey.