1) Korean boy name 
Deok-su (pronounced [tʌk̚s͈u]), also spelled Deok-soo, Duk-soo, or Duck-soo, is a Korean masculine given name. Its meaning differs based on the hanja used to write each syllable of the name. There is one hanja with the reading `deok` ({linktext|德}, meaning `morality`) and 67 hanja with the reading `su` on the South Korean government`s ...