Family name Philbrook (Philbrook 
) , around the world, is quite a rare cognomen. The surname Philbrook is characteristic of the United States, where it is a rare surname, Canada, and Australia. In absolute terms, the name is most common in the United States, Canada, and the United Kingdom.
| VARIANT | COUNTRY |
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| Philbrook | Australia, Peru, Canada, United Kingdom, United States |
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warren c. philbrook American politician, US (b. 1857) |
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mary philbrook American lawyer, US (b. 1872) |
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george philbrook American gridiron football player and athletics competitor (1884-1964), US (b. 1884) |
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| john n. philbrook American politician, US (b. 1840) |
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| eleanor philbrook (b. 1899) |
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| james philbrook American actor (1924-1982), US (b. 1924) |
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| frank philbrook Canadian politician, CA (b. 1931) |
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| simon philbrook English cricketer (born 1965), GB (b. 1965) |
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| phaethon philbrook researcher |
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| caleb j. philbrook American artist |
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| alison philbrook researcher (ORCID 0000-0003-3330-3086) |
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| lauren e philbrook researcher |
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