Cognomen D'Ailly (بطرس 
, 戴伊 
, D'Ailly 
) , in the world, is a common family name. The last name D'Ailly is habitual in Egypt, where it is quite a rare surname, Syria, and Jordan. In absolute terms, the name is most common in Egypt, Sudan, and Syria. More frequently, D'Ailly is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| بطرس | Syria, Iraq, Jordan, Egypt, Sudan |
| 戴伊 | China |
| D'Ailly | France, Netherlands, Sweden, Germany, Canada |
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pierre d'ailly French theologian, astrologer, and cardinal of the Roman Catholic Church (1351-1420), FR (b. 1350) |
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| jacqueline d'ailly (1419-1470) (b. 1419) |
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charles d'albert d'ailly French diplomat, FR (b. 1625) |
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madeleine-charlotte d'albert d'ailly (b. 1649) |
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| henri louis d'albert d'ailly duke of Chaulnes, FR (b. 1620) |
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michel-françois d'ailly French politician, FR (b. 1724) |
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| charles françois d'albert d'ailly duke of Chaulnes, FR (b. 1707) |
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| louis joseph d'albert d'ailly French chemist and aristocrat, FR (b. 1741) |
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| anthoni d'ailly (b. 1766) |
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| lotten d'ailly Swedish painter, SE (b. 1821) |
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| august d'ailly SE (b. 1822) |
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arnold jan d'ailly Dutch politician (1902-1967), NL (b. 1902) |
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| adolf d'ailly (b. 1855) |
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| sven d'ailly Swedish actor, SE (b. 1892) |
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| robert iii d'ailly, seigneur d'ailly - Bef 1384 |
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