Cognomen Hillhouse (Hillhouse 
) , all around the world, is quite a rare last name. The last name Hillhouse is habitual in Antigua and Barbuda, where it is quite a common surname, Bahamas, where it is quite a rare surname, and Australia, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Hillhouse | Australia, South Africa, Canada, United Kingdom, United States |
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james hillhouse American lawyer, real estate developer and politician (1754-1832), US (b. 1754) |
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| william hillhouse (b. 1728) |
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| john g. hillhouse (b. 1751) |
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| sarah porter hillhouse Georgia's first woman editor (b. 1763) |
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| william hillhouse (b. 1757) |
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thomas hillhouse American politician (1817-1897), US (b. 1817) |
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| james abraham hillhouse (b. 1789) |
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| augustus l. hillhouse FR (b. 1791) |
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| rebecca woolsey hillhouse hewit (b. 1794) |
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percy archibald hillhouse British naval architect (b. 1869) |
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| william hillhouse English botanist (1850-1910), GB (b. 1850) |
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| james theodore hillhouse American anglist (1890-1956), US (b. 1890) |
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| willie hillhouse Scottish footballer, GB (b. 1891) |
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| thomas p. hillhouse Canadian politician, CA (b. 1898) |
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| john hillhouse Scottish footballer (b. 1898) |
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