Cognomen Sandidge (Sandidge 
) , all over the world, is quite a rare surname. The cognomen Sandidge is habitual in the United States, where it is a rare surname, Denmark, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is commonest in the United States, Canada, and Denmark.
| VARIANT | COUNTRY |
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| Sandidge | Canada, United States, New Zealand, United Kingdom, Denmark |
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john m. sandidge American politician (1817-1890), US (b. 1817) |
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| john roy sandidge (b. 1897) |
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| theresa sandidge researcher |
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| frisco sandidge college basketball player (2007–2010) Delaware State |
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| phil sandidge college basketball player (1965–1965) William & Mary |
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| jerry l. sandidge professor of church history |
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| tim sandidge American football player, US (b. 1983) |
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