Surname Koc (Koc 
, Khoc 
, Kotze 
) , all around the world, is a common family name. The cognomen Koc is characteristic of Sub-Saharan Africa, particularly Namibia, where it is a common surname, South Africa, where it is quite a common surname, and Lesotho (explore the name in all countries). In absolute terms, it is the most numerous in South Africa, Turkey, and Germany. Very seldom, Koc is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Koc | France, Turkey, South Africa, Germany, Poland |
| Khoc | South Africa, United States, Malaysia, Vietnam, Canada |
| Kotze | France, South Africa, Germany, Austria, Namibia |
| Chozza | Argentina, Uruguay |
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adam koc Polish politician, US (b. 1891) |
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leon koc Polish officer, PL (b. 1892) |
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tadeusz koc Polish pilot and fighter ace of World War II, PL (b. 1913) |
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| pavel koc CZ (b. 1896) |
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| stefan koc Polish trade unionist, PL (b. 1909) |
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maria koc Polish politician, PL (b. 1964) |
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| marcelo koc Argentine composer (1918-2006), AR (b. 1918) |
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| franciszek koc (b. 1913) |
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| barbara koc Polish historian, PL (b. 1925) |
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mazlum koc German politician, DE (b. 1989) |
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| karel koc CZ (b. 1934) |
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| václav koc Czech soccer player, CZ (b. 1965) |
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| ilteris koc badminton player, TR (b. 1976) |
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| behlul koc researcher |
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| yener koc researcher, ORCID id # 0000-0002-3919-9649 |
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