Last name Clay (Clay 
, كلاي 
, 克莱 
, along with others...) , in all the world, is a common cognomen. The cognomen Clay is characteristic of Isle of Man, where it is quite a common surname, the United States, and the United Kingdom, where it is quite a rare surname. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Indonesia. Likewise, Clay is the forename as well as the last name.
| miriam clay Peerage person ID=415770 (b. 1683) |
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| mary clay (born 1685) (b. 1685) |
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| joseph clay (born 1688) (b. 1688) |
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joseph clay American soldier and politician from Georgia (1741–1804), US (b. 1741) |
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| thomas clay (born 1698) (b. 1698) |
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matthew clay American politician (1754-1815), US (b. 1754) |
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joseph clay U.S. Representative from Pennsylvania (1769–1811), US (b. 1769) |
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| thomas clay (born 1722) (b. 1722) |
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| samuel clay (born 1724) (b. 1724) |
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| joseph clay (born 1726) (b. 1726) |
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henry clay American politician from Kentucky (1777-1852), US (b. 1777) |
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| elizabeth clay (born 1729) (b. 1729) |
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| prudence clay (1731-1732) (b. 1731) |
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clement comer clay American politician (1789-1866), US (b. 1789) |
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sir william clay, 1st baronet British politician (1791-1869) (b. 1791) |
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