Cognomen Siddle (Siddle 
) , all over the world, is quite a rare last name. The surname Siddle is characteristic of the United Kingdom, where it is quite a rare surname, Australia, and New Zealand, where it is a rare surname. In absolute terms, it is commonest in the United Kingdom, the United States, and Australia.
| VARIANT | COUNTRY |
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| Siddle | Canada, Malaysia, Australia, United States, United Kingdom |
| reg siddle English footballer (1906-1995), GB (b. 1906) |
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| joe siddle American baseball player, US (b. 1921) |
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peter siddle Australian cricketer, AU (b. 1984) |
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| richard siddle (b. 1959) |
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| john siddle British graphic designer |
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| katherine j siddle researcher |
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| heidi jeannette siddle researcher |
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| hannah vt siddle researcher (ORCID 0000-0003-2906-4385) |
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| ronald siddle researcher |
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| takayo siddle American basketball player and coach, US (b. 1986) |
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