Surname Summerhill (Summerhill 
) , across the world, is quite a rare cognomen. The last name Summerhill is characteristic of Isle of Man, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and Australia. In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, Summerhill is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Summerhill | Canada, United Kingdom, United States, Spain, Australia |
| bill summerhill Canadian ice hockey player, CA (b. 1915) |
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daniel summerhill American cyclist, US (b. 1989) |
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| ralph richard summerhill Ph.D. University of Iowa 1969 |
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| james summerhill Peerage person ID=549222 |
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| william summerhill economic historian |
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| marjorie isabel summerhill (died 1973) |
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| keith summerhill researcher |
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| stephen j. summerhill US |
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| aled summerhill British rugby union player, GB (b. 1994) |
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