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Cognomen כוחאי (כוחאי ) , in all the world, is a very rare last name. The last name כוחאי is habitual in Western Asia, particularly Israel, where it is a rare surname.
Khochay, Khuchay, Kochay, Kohay, Kuchay, and Kuhay
ערן, ורד, זיו, יניב, עינב, and שיראל