Surname Trewartha (Trewartha 
) , around the globe, is a rare family name. The family name Trewartha is habitual in Australia, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and New Zealand. Measured by absolute frequency, the name is most common in Australia, the United States, and the United Kingdom.
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| Trewartha | United Kingdom, Australia, Mexico, United States, Canada |
| glenn thomas trewartha American geographer (1896-1984), US (b. 1896) |
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| kevin m trewartha researcher |
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| william anthony trewartha Peerage person ID=21921 |
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| paul trewartha editor |
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| william ian alexander trewartha (born 1993) (b. 1993) |
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| lucinda jane trewartha Peerage person ID=709609 (b. 1995) |
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