철수 (Cheol-su) is to Korean what
小明 (Xiǎo Míng) or 'John' is to Chinese/English textbooks — the default male name in language-learning examples, paired with 영희 (Yeong-hee,
英姬) as the standard female counterpart. The hanja
哲 'wise' +
洙 (a river name in Confucius's hometown) give it a traditional, scholarly feel.