Last name Plunket (Plunket 
) , throughout the world, is a rare surname. The last name Plunket is habitual in Ireland, where it is quite a rare surname, New Zealand, where it is a rare surname, and Australia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in the United States, France, and Ireland. Very seldom, Plunket is the forename as well as the last name.
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| Plunket | United Kingdom, Ireland, France, New Zealand, United States |
| thomas fitz-christopher plunket Irish judge (b. 1407) |
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| thomas plunket Irish landowner, lawyer and judge (b. 1440) |
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| john plunket Irish judge (b. 1497) |
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| patrick plunket Anglo-Irish politician (b. 1595) |
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| nicholas plunket Plunket, Nicholas (c.1629–1718), historian (b. 1629) |
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| john plunket Plunket, John (1668–1738), Jacobite conspirator (b. 1668) |
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| john plunket (b. 1664) |
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| patrick plunket (1684-1760) (b. 1684) |
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william plunket, 1st baron plunket British politician, GB (b. 1764) |
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| thomas plunket Plunket, Thomas, Baron Plunket in the nobility of the Holy Roman empire (1716–1779), army officer in the Austrian service (b. 1716) |
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harriette m. plunket American sanitary reformer, US (b. 1826) |
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william plunket, 4th baron plunket Irish bishop, IE (b. 1828) |
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| thomas plunket Irish soldier in the British army, GB (b. 1785) |
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david plunket, 1st baron rathmore British politician, IE (b. 1838) |
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| thomas plunket, 2nd baron plunket Irish bishop (b. 1792) |
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