Hangul, The great sound.
한글 디자이너 세종대왕, 빛나는 소리 한글
The designer of Hangul, King Sejong the Great
'Hangul'(Korean alphabet) is a phonogram designed based on 'sound'.
Hangul was designed by King Sejong the Great.
King Sejong is the designer of Hangul who designed the letters with sound.
(The reason King Sejong designed Hangul with sound was for the voices of the powerless people)
So we call him Sejong King the Great with respect.