For those who are interested here is the direct line of her mother Princess Pulcheria from the Byzantine Emperors:
IOANNES VI Kantakuzenos,Emperor of Byzantium from 1347-1354
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Matias Asen Kantakouzenos,Co-Emperor of Byzantium from 1353-1357
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Demetrius I Kantakuzenos,Sebastocrator from 1355-1356,Despot of Mereia in 1383,lived from 1343-1420
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Prince Georgios Palaiologos Kantakouzenos "Sachatai",died in 1459
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Prince Demetrius II Kantakuzenos
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Prince Michai Cantacuzene,died in 1522
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Prince Dimitrie Cantacuzene,the ''Sheitan"(means the Devil),died in 1536 in Pisa
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Prince Michai Cantacuzene,lived from 1515-1578
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Prince Andronikos Cantacuzene,lived from 1553-1601
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Prince Iordache Cantacuzene,Great Treasurer of Moldavia,lived from 1581-1663
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Prince Iordache Cantacuzene-Pascanu,died in 1720
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Prince Iordache Cantacuzene-Pascanu,died in 1741
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Prince Iordache Cantacuzene-Pascanu,lived from 1740-1826
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Prince Konstantin Cantacuzene-Pascanu,lived from 1778-1843
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Prince Nicolae Cantacuzene-Pascanu,lived from 1811-1840
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PRINCESS PULCHERIA CANTACUZENE-PASCANU,lived from 1840-1865=Prince Emil zu Sayn-Wittgenstein-Berleburg(1824-1878)