Korean Romanization 'Sangdoo' / 'Sang-du' rendered character-by-character:
尚 (Sang) +
斗 (Doo). Best known from the 2005 KBS drama 《
对不起,
我爱你》 era and the romance series 《
尚斗,
我们去上学吧》 (Sangdoo, Let's Go to School).
斗 is read dòu here for names — not the dǒu reading used for the dipper/measure.