Cognomen Koretz (Koretz 
, קורץ ) , throughout the world, is a rare family name. The surname Koretz is characteristic of Israel, where it is quite a rare surname, Czechia, where it is a rare surname, and Estonia. In absolute terms, it is commonest in Israel, the United States, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Koretz | Israel, United States, New Zealand, Czechia, Germany |
| קורץ | Israel |
| karl koretz holocaust victim, b. 1861-05-14, CZ (b. 1861) |
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| adolf koretz holocaust victim, b. 1862-02-18, CZ (b. 1862) |
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| karl koretz musician and composer from Czechia, CZ (b. 1865) |
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| maximilian koretz holocaust victim, b. 1873-11-02, CZ (b. 1873) |
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| alois koretz holocaust victim, b. 1875-11-05, CZ (b. 1875) |
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| leo koretz American lawyer, stockbroker, and swindler, CZ (b. 1879) |
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| amalia koretz PL (b. 1871) |
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| paul koretz Austrian art agent and film company manager, AT (b. 1885) |
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| arnošt koretz holocaust victim, b. 1889-11-23, CZ (b. 1889) |
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| hugo koretz prisoner of a Nazi regime, DE (b. 1890) |
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| leopoldine koretz prisoner of a Nazi regime, DE (b. 1891) |
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| hugo koretz holocaust victim, b. 1891-03-22, CZ (b. 1891) |
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| oskar koretz holocaust victim, b. 1892-06-04, CZ (b. 1892) |
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| josef koretz holocaust victim, b. 1892-01-26, CZ (b. 1892) |
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| artur koretz holocaust victim, b. 1892-09-20, CZ (b. 1892) |
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