Henry III de PERCY
Henry III de was born on February 6th, 1301 in Leckonfield, East Riding, Yorkshire, England.  He died at the age of 52 on February 25th, 1353 in Alnwick Castle, Alnwick, Northumberland, England.

 Idonea de CLIFFORD
Idonea de was born in 1303.  She died at the age of 62 on August 26th, 1365.

 Henry IV de PERCY
Henry IV de was born in 1322.  He died at the age of 46 on May 18th, 1368 in Berwick Castle, Berwick, Wiltshire, England.