Family name Holtby (Holtby 
) , in all the world, is quite a rare last name. The surname Holtby is habitual in Canada, where it is a rare surname, the United Kingdom, and New Zealand. Not in comparison with a country's population, the name is most common in the United Kingdom, Canada, and the United States.
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| Holtby | Canada, New Zealand, Australia, United States, United Kingdom |
| richard holtby English Jesuit priest (b. 1553) |
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| winifred holtby British writer, GB (b. 1898) |
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| phyllis holtby Canadian music educator, CA (b. 1906) |
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| robert holtby British priest and writer (b. 1921) |
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chris holtby British diplomat |
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braden holtby Canadian ice hockey goaltender, CA (b. 1989) |
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| don holtby CA (b. 1937) |
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| derek william holtby Ph.D. Australian National University 1997 |
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| harold holtby (died 1961) |
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| tom rookledge holtby Peerage person ID=94476 |
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| joan holtby Peerage person ID=300869 |
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| john holtby English rugby union player (b. 1982) |
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| joshua holtby German football player of English descent, DE (b. 1996) |
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