Kim Jong-Il's son became known to insiders while he attended the International School of Berne, Switzerland, (ISB) during the 1990s (1993 or 1994). At that time, he called himself Chol Pak. Kim Jong-Un arrived together with Kwang Chung, another North Korean and probably his bodyguard at that time. [Source: Memories of a former classmate at ISB.]
On September 29, foreign media reported that Kim Jong-Il, the leader of North Korea, had introduced his son Kim Jong-Un as his successor. The day before, the North Korean news agency had already mentioned Kim Jong-Un on their website as a vice-chairman of the Central Military Commission after a reorganization of that commission. International media reported that Kim Jong-Un had been declared a general of the North Korean armed forces.