1st Earl of Northumberland Henry Percy & Margaret Neville 
Henry and Margaret were married on July 12th, 1358.1 They had three sons named Hotspur, Thomas and Ralph.
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Personal Details
1st Earl of Northumberland Henry Percy
Henry was born on November 10th, 1341 in Castle Raby, England.1 He died due to Battle of Bramham Moor at the age of 66 on February 29th, 1408 in Bramham Moor.1
Margaret Neville
Margaret was born on February 12th, 1341.1 She died at the age of 31 on May 12th, 1372.1
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Children
Henry (Hotspur) Percy
Henry, known as Hotspur, was born on May 20th, 1364 in Alnwick, Northumberland, England.2 He died due to Battle of Shrewsbury at the age of 39 on July 21st, 1403 in Shrewsbury, Shropshire, England.2
1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I5750&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I12323&style=TABLE
3 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=arciek&id=I18607
4 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I5777
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I12323&style=TABLE
3 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=arciek&id=I18607
4 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I5777