Names and Titles
It is considered very impolite to address a Korean with his or her given name. Address Koreans using appropriate professional titles until specifically invited by your host or colleagues to use their given names.
Americans should address a Korean with Mr., Mrs., Miss + family name; however, never address a high-ranking person or superior in this manner.
Korean names are the opposite of Western names with the family name first, followed by the two-part given name. The first of the two given names is shared by everyone of the same generation in the family, and the second is the individual's given name. Example: Lee (Family) + Dong (Shared Given) + Sung (Given). Dong Sung is the individual's given name. Address him as Mr. Lee or Lee Sonsaengnim (which means "teacher").