Family name Siddoway (Siddoway 
) , across the world, is a rare last name. The family name Siddoway is characteristic of the United States, where it is a rare surname, New Zealand, where it is a very rare surname, and the United Kingdom. In absolute terms, this name is the most popular in the United States, the United Kingdom, and Canada.
| VARIANT | COUNTRY |
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| Siddoway | Canada, Brazil, New Zealand, United Kingdom, United States |
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christine siddoway American Antarctic researcher, US (b. 1961) |
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| richard m. siddoway American politician, US (b. 1940) |
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| jeff siddoway American politician, US (b. 1948) |
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| benjamin siddoway researcher (ORCID 0000-0002-3430-4892) |
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| michael frank siddoway Ph.D. Tulane University 1988 |
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