Henry De Percy
Henry De was born in 1320 in Of, Castle, Alnwick, Northumberland and his baptism took place in 46 1368.¹   He died at the age of 48 on May 18th, 1368.  He was buried in ,Alnwick, Northumberland, England.^1 1 

 Mary Plantagenet
Mary was born in 1320 in Of Tutbury Castle, Tutbury, Staffordshire, England.¹   She died at the age of 42 on September 1st, 1362.  She was buried in ,Alnwick, Northumberland, England.^1 1 

 Henry De Percy
Henry De was born on November 10th, 1341 in Of Alnwick Castle, Alnwick, Northumberland, England and his baptism took place on November 10th, 1341 in Of, Northumberland, England.¹   He died in Slain.  He was buried in ,York Minster, Yorkshire, England.^1 1 

 Thomas Percy
Thomas was born about 1345 in Of, Alnwick, Yorkshire, England.¹   He died on July 21st, 1403 in Shrewsbury, Shropshire, England.¹