한 Koo Hanna Koo Hanna (구한나) is a South Korean Female Artist. She started in group UDTT. Read All General Information International Stage Name : Koo Hanna Domestic Stage Name : Pronounce 구한나 Full Name : Koo Hyun Kyoung Pronounce Full Domestic Name : Pronounce 구현경 Date of Birth : 2004-01-20 (age 22) Zodiac : Aquarius Country of Birth : South Korea Related Artists : UDTT - Vocal,Dancer Original group : UDTT Images