Um, the way they're written? For example, Jin Hwa would be pronounced like gin (the alcohol) and combining the h sound in "hunt" and the wa sound in "want." Koreans don't use as many honorifics as, let's say, the Japanese, but you do get honorifics like "nim" (very formal, reserved for those higher than you, often used between servant/employee and employer) pronounced with the ne sound in knee and just m as in "mom." Sunbae and hoobae (like senpai and kouhai): sun-bay, who-bay.
It ANNOYS ME LIKE CRAZY, HOW DO YOU PRONOUNCE KOREAN NAMES AND HORRIFFICS?!?!?!?!?!?!?!