His nickname was Haegong ( 해공 , 海公 ) , Haehoo ( 해후 , 海候 ) also courtesy name was Yeogu ( 여구 , 如耉 ) .
nickname was Haegong ( 해공 , 海公 ) and Haehoo ( 해후 , 海候 ) , customs name was Yeogu ( 여구 , 如耉 ) .