In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.
Q: Choi is a common Korean family name. In English speaking countries, it is most often anglicized Choi, and sometimes also Choe. Ethnic Koreans in the former USSR prefer the form Tsoi (Tsoy) especially as a transcription of the Cyrillic Цой.
A: 
where does the last name choi come from