Last name Kennedy (Kennedy 
, קנדי 
, Кеннеди 
, along with others...) , all around the world, is a widespread cognomen. The last name Kennedy is characteristic of Ireland, where it is a common surname, Australia, where it is quite a common surname, and New Zealand (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. Also, Kennedy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kennedy | United Kingdom, United States, Australia, Kenya, Nigeria |
| קנדי | Israel |
| Кеннеди | Ukraine, Russia |
| Кенеди | Russia |
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james kennedy 15th-century bishop of Dunkeld and of St. Andrews, GB (b. 1408) |
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| gilbert kennedy, 1st lord kennedy Scottish noble (b. 1405) |
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| john kennedy Scottish nobleman (b. 1451) |
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| walter kennedy medieval Scottish poet (b. 1455) |
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| david kennedy, 1st earl of cassilis Scottish nobleman (b. 1471) |
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| janet kennedy Mistress of James IV of Scotland (b. 1490) |
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| gilbert kennedy, 2nd earl of cassilis 2nd Earl of Cassidis (b. 1492) |
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| egidia gelis kennedy Peerage person ID=133629 (b. 1515) |
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| gilbert kennedy, 3rd earl of cassilis Scottish politician and judge (b. 1517) |
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| margaret kennedy Peerage person ID=24291 (b. 1517) |
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| quintin kennedy Scottish abbot of Crossraguel and religious controversialist (b. 1520) |
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| gilbert kennedy, 4th earl of cassilis Scottish noble (b. 1541) |
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| john kennedy, 5th earl of cassilis Scottish peer (b. 1575) |
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| john kennedy, 6th earl of cassilis Scottish peer (b. 1601) |
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| sir richard kennedy, 2nd baronet Irish judge (b. 1615) |
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