Surname Sieff (西夫 
, Sieff 
) , worldwide, is a rare family name. The cognomen Sieff is habitual in Monaco, where it is quite a common surname, Italy, where it is a rare surname, and the United Kingdom. Measured by absolute frequency, it is commonest in Italy, the United Kingdom, and the United States. Very seldom, Sieff is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 西夫 | China |
| Sieff | South Africa, Argentina, Italy, United Kingdom, United States |
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rebecca sieff British Zionist, GB (b. 1890) |
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| ephraim sieff (1863-1936) (b. 1863) |
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| israel sieff, baron sieff English businessman (1889-1972), GB (b. 1889) |
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| miriam sieff (died 1971) (b. 1894) |
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| joseph sieff English businessman, GB (b. 1905) |
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| edward sieff (1906-1982) (b. 1906) |
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| michael david sieff (1911-1987) (b. 1911) |
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| marcus sieff, baron sieff of brimpton British businessman and Baron (1913-2001), GB (b. 1913) |
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| judith hannah sieff (born 1921) (b. 1921) |
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| jonathan sieff (born 1933), GB (b. 1933) |
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| jeanloup sieff French photographer, FR (b. 1933) |
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| david sieff British businessman (1939-2019), GB (b. 1939) |
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annika sieff Italian ski jumper and nordic combined skier, IT |
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| adam sieff British record producer (b. 1954) |
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| mark sieff (born 1959), GB (b. 1959) |
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Mr, Ezra, Hans, Ivor, Oren, Zach, Zack, Mario, Marta, Sacha, Simon, Sonia, Anita, Ariel, Carla, Carly, Colin, Cindy, Kerry, Kevin, Pablo, Peter, Evan, Elva, Nick, Jill, Ms, Sir, Ali, Ana, Ben, Eva, Val, Ivy, Mark, Matt, Delia, Anne, Bill, Dawn, Lady, Lino, Lord, Jack, Jose, John, Joel, Juan, Adam, and David