Last name Grinham (Grinham 
) , around the world, is a rare surname. The surname Grinham is habitual in Australia, where it is quite a rare surname, the United Kingdom, where it is a rare surname, and New Zealand. In absolute terms, it is commonest in the United Kingdom, Australia, and the United States.
| VARIANT | COUNTRY |
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| Grinham | United Kingdom, Australia, United States, Canada, New Zealand |
| james grinham English cricketer (1798-?), GB (b. 1798) |
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| fred grinham cyclist, US (b. 1881) |
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judy grinham British swimmer, Olympic gold medallist, former world record-holder, GB (b. 1939) |
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rachael grinham Australian squash player, AU (b. 1977) |
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natalie grinham Australian squash player, NL (b. 1978) |
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jodie grinham British Paralympic archer, GB (b. 1993) |
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| alistair r grinham researcher |
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| luke r grinham researcher (ORCID 0000-0001-5583-8052) |
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