Family name Tkach (Ткач 
, Tkach 
, Ткачь ) , all over the world, is a common cognomen. The family name Tkach is characteristic of Ukraine, where it is quite a common surname, Belarus, and Reunion (explore the name in all countries). Measured by absolute frequency, the name is most common in Ukraine, Russia, and Kazakhstan.
| mikhail tkach American spy (b. 1891) |
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joseph tkach, jr. American evangelical Christian leader, US (b. 1951) |
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yurii tkach (b. 1954) |
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| mykhailo tkach (b. 1904) |
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| walter r. tkach American physician (1917–1989), US (b. 1917) |
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| zinaida tkach (b. 1912) |
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| joseph w. tkach Second Pastor General of the Worldwide Church of God, US (b. 1927) |
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| nina tkach PL (b. 1926) |
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yaroslav tkach Ukrainian speed climber, UA |
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| mercedes tkach researcher |
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| shaun tkach researcher |
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| a. tkach researcher, ORCID id # 0000-0002-0318-9262 |
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| gennadii tkach researcher |
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| mykola tkach researcher ORCID ID = 0000-0003-2620-2236 |
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| oleksandra iosypivna tkach Ph.D. Ivan Franko National University of Lviv 1998 |
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