Wikipedia
Czajkowski (, feminine: Czajkowska, plural: Czajkowscy) is the Polish form of a Slavic surname. Its Russian ( Cyrillic: Чайко́вский, fem: Чайко́вская) and Ukrainian (Чайко́вський, fem: Чайковська) forms have numerous English transliterations, including Chaikovskiy, Chaikovsky, Chaikovskyi, Chaykovskiy, and Chaykovsky; and, influenced by French, Tchaikovski or Tchaikovsky (feminine ending in Russian: -skaia or -skaya; Ukrainian: -ska).
The name also occurs among other Slavic languages which use the Latin alphabet, such as Czech (Čajkovskij), Slovak (Čajkovský), and West South Slavic (Čajkovski). Less common transliterations include Tsjaikovski ( Dutch), Tschaikowski ( German), and Tjajkovskij ( Swedish). The surname, in all its forms, is shared by the following individuals and fictional entities: