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Cognomen Daych (Daych
, Дайч
, Даич
) , in all the world, is a rare last name. The cognomen Daych is characteristic of Kazakhstan, where it is a rare surname, Ukraine, and Morocco, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Russia, Ukraine, and Kazakhstan. Much less frequently, Daych is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Daych | Australia, Morocco, Thailand, United States, Canada |
| Дайч | Ukraine, Russia, Kazakhstan |
| Даич | Russia |