Bang Yong guk
Bang Yongguk , known as Yongguk, is a rapper and member of the South Korean boy group B.A.P under TS Entertainment.
Bang Yongguk was born in Incheon, South Korea, on March 31, 1990. He has an identical twin brother named Yongnam, who has also performed as an underground artist, and an older sister named Natasha. He was not able to talk until he was five years old.
Source: Wikipedia