Last name Jermyn (杰明 
, 捷文 , Jermyn 
) , globally, is quite a rare surname. The cognomen Jermyn is characteristic of Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. In absolute terms, it is the most numerous in China, the United States, and the United Kingdom. More prevalently, Jermyn is the forename as well as the last name.
| VARIANT | COUNTRY |
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| 捷文, 杰明 | China |
| Jermyn | Australia, China, Philippines, United States, United Kingdom |
| isabel jermyn 1435- (b. 1434) |
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| thomas jermyn English landowner (d. 1552) (b. 1485) |
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| ambrose jermyn Peerage person ID=174881 (b. 1511) |
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| robert jermyn English politician (b. 1539) |
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henry jermyn, 1st earl of st albans English politician and courtier (1605-1684), GB (b. 1605) |
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| thomas jermyn English Member of Parliament (1561-1607) (b. 1561) |
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| thomas jermyn English politician (d. 1645) (b. 1573) |
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thomas jermyn, 2nd baron jermyn Governor of Jersey (b. 1633) |
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henry jermyn, 1st baron dover English noble (1636–1708) (b. 1636) |
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| philip jermyn Jermyn, Philip (1587/8–1654), lawyer and judge (b. 1587) |
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| robert jermyn English Member of Parliament (1601-1623) (b. 1601) |
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| thomas jermyn English politician (d. 1659) (b. 1604) |
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| henrietta jermyn (born 1632) (b. 1632) |
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| jermyn wych British Member of Parliament (c1670-1720) (b. 1670) |
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| sir jermyn davers, 4th baronet English politician and landowner (1686–1743) (b. 1686) |
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