Last name Houstoun (Houstoun 
) , in the entire world, is a rare cognomen. The family name Houstoun is habitual in New Zealand, where it is a rare surname, Ireland, and the United Kingdom. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Canada. Very seldom, Houstoun is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Houstoun | United Kingdom, Canada, Australia, New Zealand, United States |
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william houstoun American legislator (1755-1813), US (b. 1755) |
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| john houstoun American politician (1744-1796), US (b. 1744) |
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mrs. m. c. houstoun American novelist and travel writer, GB (b. 1815) |
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| alexander houstoun British Member of Parliament (1770–1822) (b. 1770) |
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| patrick houstoun (born 1777) (b. 1777) |
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| patrick houstoun (1802-1802) (b. 1802) |
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| william houstoun (1811-1872) (b. 1811) |
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| george houstoun (born 1841) (b. 1841) |
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michael houstoun Concert pianist from New Zealand, NZ (b. 1952) |
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| d. mackay houstoun Canadian, born 1916; artist, CA (b. 1916) |
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| andrew beatty houstoun (1922-2017) (b. 1922) |
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| archie houstoun New Zealand local politician, NZ (b. 1922) |
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| william robert houstoun (born 1954) (b. 1954) |
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| david waldron houstoun (born 1957), GB (b. 1957) |
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| alexander michael houstoun (born 1958) (b. 1958) |
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Mr, Jake, John, Jeri, Eric, Fred, Will, Maria, Marfy, Morag, Sarah, Simon, Cathy, Colin, Ciara, Brian, Bruce, Katie, Kevin, Robin, Lynn, Lisa, Lacy, Doug, Ms, Al, Ann, Amy, Rob, Lia, Jon, Jim, Mary, Rhett, Mark, Moni, Mimi, Sara, Alex, Andy, Axel, Kate, Paul, Rock, Matt, and David