Richard the Great de Burgh
Richard the Great was born before 1205.  Richard the Great is no longer alive.

 Egidia Giles de Lacy
Egidia Giles was born about 1204.

 Walter de Burgh
Walter was born about 1230.  He died on July 28th, 1271.

 Margery de Burgh
Margery was born before 1243.

 Richard de Burgh
Richard was born before 1243.

 William 'oc de Burgh
William 'oc was born before 1243.