Henry I De Percy
Henry I was born in 1235 in Whitby, Yorkshire, England.  He died at the age of 37 on August 29th, 1272 in Sallay, Craven, Yorkshire, England.

 Alianore Plantagenet De Warrenne
Alianore Plantagenet was born in 1244 in Warren, Surrey, England.  She died after 1282.

 John De Percy
John was born in 1270.

 Henry II De Percy
Henry II was born on March 25th, 1273 in Petworth, Sussex, England.  He died at the age of 41 in October 1314 in Alnwick, Northumberland, England.  He was buried on October 10th, 1314 in Fountains Abbey, Yorkshire, England.