All around the world, Sydenham (Sydenham 
) is a very rare largely masculine, but seldom girly first name. Much more prevalently, Sydenham is the last name as well as the forename.
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| Sydenham | United Kingdom, South Africa, Australia, United States, Canada |
| humphrey sydenham Church of England clergyman and religious controversialist (b. 1591) |
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| cuthbert sydenham English Independent minister and political writer, GB (b. 1622) |
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| humphrey sydenham British politician (b. 1694) |
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| floyer sydenham British classical scholar, GB (b. 1710) |
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| sir humphrey sydenham Peerage person ID=414740 |
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| sir john sydenham Peerage person ID=135559 |
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| sir ralph sydenham Peerage person ID=219276 |
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| sir john sydenham Peerage person ID=396478 |
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| sir george sydenham Peerage person ID=249002 |
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| humphrey sydenham Peerage person ID=470884 |
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| sir john sydenham Peerage person ID=224713 |
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| sir john sydenham, 1st bt. Peerage person ID=500656 |
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| humphrey sydenham Peerage person ID=473458 |
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