Surname Hillyar (Hillyar 
) , globally, is a rare cognomen. The cognomen Hillyar is characteristic of New Zealand, where it is a rare surname, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Hillyar | United Kingdom, Australia, United States, Canada, New Zealand |
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james hillyar British Royal Navy admiral, US (b. 1769) |
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| charles hillyar British Royal Navy admiral (1817-1888), GB (b. 1817) |
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| mary anne bickerton hillyar (1817-1891) (b. 1817) |
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| henry hillyar British Royal Navy admiral (1819-1893) (b. 1819) |
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| hillyar george edwin hill-trevor (1895-1914) (b. 1895) |
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| robin hillyar Kenyan rally driver, KE (b. 1953) |
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| william hillyar British Royal Navy officer, captain in 1836 |
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| hillyar david chapman Peerage person ID=524821 |
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Mr, Linda, Jamie, Jason, Tanya, Irene, Wayne, Sandra, Sabina, Sherie, Steven, Alison, Andrew, Regina, Lesley, Lester, Louise, Jackie, Joanne, Victor, Melanie, Michael, Gemma, Shannon, David, Peter, Ms, Tim, Mark, Matt, Sean, Alec, Alan, Anya, Carl, Cara, Kate, Rita, Lisa, Mandy, Sarah, Simon, Anita, Chris, Chloe, Karen, Kelly, Debby, and Charles