Family name Horswill (Horswill 
) , in the entire world, is a rare last name. The family name Horswill is habitual in Australia, where it is a rare surname, the United Kingdom, and New Zealand. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Horswill | Canada, Australia, United States, United Kingdom, South Africa |
| albert edward james horswill Titanic survivor (b. 1879) |
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| micky horswill English footballer (born 1953), GB (b. 1953) |
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| catharine horswill researcher |
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| alexander r horswill researcher (ORCID 0000-0002-5568-0096) |
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| m. horswill researcher |
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| ian horswill Ph.D. Massachusetts Institute of Technology 1993 |
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| alexander r horswill |
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