Rank Name Net Worth ($mil) Source Age 1 이건희 / 李健熙 (Lee Kun-Hee) 3,900 Samsung Group 67 2 정몽구 / 鄭夢九 (Chung Mong-Koo) 1,850 Hyundai Motor 71 3 정몽준 / 鄭夢準 (Chung Mong-Joon) 1,300 Hyundai Heavy Industries 57 4 Lee Myung-Hee 1,…