Cho Nam-chul
Cho Namchul (November 30, 1923 - July 2, 2006, alternately Cho Namcheol) was a professional Go player (Baduk in Korean). He died of natural causes in Seoul at the age of 83.
Cho Gyeong-chul
Cho Gyeong-chul (, April 4, 1929 – March 6, 2010) was a South Korean astronomer.
He was born in Sonchon, Pyongannam-do. He finished his middle and high school courses at Pyongyang and was then admitted to Yonhui University. During the Korean War he served in the South Korean army, and in 1952 he was a professor at the South Korean military academy. In 1954 he graduated in physics from Yonhui University.