A korean has two names: the family name is followed by a personal name.
Most of the family names are of one syllabe like Park (박), but a few unusual ones have two syllabes like Hwangbo.
The most diffuses family names are:
Kim, Gim ( 김 )
Lee, Yi, Rhee ( 이 )
Park, Pak ( 박 )
Choi ( 최 )
Jung, Jeong, Chung, Cheong ( 정 )
If the family name has two syllabes, the personal name has only one, so that either way there are three syllables in the full name.
THINGS TO REMEMBER:
It is generally considered rude to address anyone by their given name in Korean culture, especially if you are speaking to elder people, and anyway to adults.
Among adults of similar status you can address the other by the full name, with the suffix ssi (씨) added.
Whenever the person has an official rank, usaually you address him/her using the name of that rank (such as “Manager”). Several times you will hear the honorific nim (님) added. In such cases, the full name of the person has to be appended, although this can also imply that the speaker is of higher status.
Among children and close friends, person’s birth names are commonly used.
SUGGESTED LINKS:
http://en.wikipedia.org/wiki/Korean_name