Surname Kacai (Kacai 
, Кацай 
) , around the globe, is quite a rare family name. The last name Kacai is habitual in Ukraine, where it is quite a rare surname, Russia, where it is a rare surname, and Kyrgyzstan. Measured by absolute frequency, the name is most common in Ukraine, Russia, and India. Much less frequently, Kacai is the forename as well as the last name.