Cognomen Sieloff (Sieloff 
) , worldwide, is a rare family name. The cognomen Sieloff is characteristic of Germany, where it is a rare surname, the United States, and Norway, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in the United States, Germany, and the United Kingdom.
| VARIANT | COUNTRY |
|---|---|
| Sieloff | Canada, Australia, United States, United Kingdom, Germany |
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klaus-dieter sieloff German footballer (1942-2011), DE (b. 1942) |
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| werner sieloff DE (b. 1898) |
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patrick sieloff American ice hockey player, US (b. 1994) |
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| ron sieloff American politician, US (b. 1944) |
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| anke sieloff German singer and opera singer, DE (b. 1965) |
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| christina sieloff researcher ORCID ID = 0000-0002-8297-3150 |
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| eric sieloff researcher |
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| anna sieloff American association football player, US (b. 1992) |
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