Three-character name structured
姓+
名: surname
柳 Liǔ ('willow') + given name
义泰 Yìtài ('righteousness + grand').
柳 is a classic Chinese surname but also extremely common in Korea (Hangul: 류 / 유, romanized Yoo or Ryu) — when this exact spelling appears in K-drama subtitles or news, the bearer is usually a Korean character named Yoo Eui-tae rather than a Han Chinese person.