Lord of Connaught William de Burgh & Mor O'Brien 
They had a son named The Great.
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Personal Details
Lord of Connaught William de Burgh
William was born in 1160 in Burgh-Next-Aylsh, Norfolk, England.1 He died at the age of 45 in 1205.2
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Children
Lord of Connaught Ricahrd (The Great) de Burgh
Ricahrd, known as The Great, was born in 1202.2 He died at the age of 40 in 1242.2
1 http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=michaelrneuman&id=I014397
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I6589&style=TABLE
2 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=PED&db=jdp-fam&id=I6589&style=TABLE