Kim Jong-suk
Jang Song-thaek (January or February 1946 – 12 December 2013) was a leading figure in the government of North Korea. He was married to Kim Kyong-hui, the only daughter of North Korean Premier Kim Il-sung and his first wife Kim Jong-suk, and only sister of North Korean general secretary Kim Jong-il. He was therefore the uncle (by marriage) of current leader of North Korea, Kim Jong-un.