Cognomen Diack (杰克 
, Diack 
, Диак 
) , worldwide, is a common family name. The cognomen Diack is characteristic of Sub-Saharan Africa, particularly Senegal, where it is quite a common surname, Mauritania, where it is quite a rare surname, and the Democratic Republic of the Congo. Measured by absolute frequency, it is commonest in Senegal, the Democratic Republic of the Congo, and China. Very seldom, Diack is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 杰克 | China |
| Diack | Senegal, France, Mauritania, Democratic Republic of the Congo, United Kingdom |
| Диак | Russia, Kazakhstan |
| john diack (b. 1828) |
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| j. michael diack Scottish music publisher and composer; 1869-1946 (b. 1869) |
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lamine diack Senegalese sports manager, Chairman of the Board of the National Water Company of Senegal, SN (b. 1933) |
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| tuppy diack New Zealand rugby union player, NZ (b. 1930) |
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| abdoulaye diack Senegalese politician (1933-2009), SN (b. 1933) |
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| mateugue diack researcher |
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| lesley diack researcher |
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| abigail b diack researcher |
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| papa massata diack Senegalese businessman. World Athletics consultant and son of Lamine Diack, SN |
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| robbie diack rugby player, ZA (b. 1985) |
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| ahmed diack football player (b. 1998) |
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| lamine diack Senegalese footballer |
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