KIM Jong-un’s eldest child is a son who could be the heir to the North Korean supreme leadership, it has been revealed.

South Korean intelligence has confirmed for the first time that his first kid was a boy born in 2010.

This could mean that the lad is already being groomed for power, given the secretive state’s hereditary male leadership, reports the Sunday Times.

Earlier this week it was revealed that Kim had sired a third child with wife Ri Sol-ju at some point this year, but it was unknown what the sex of the baby was.

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Previously it was known that the couple already had two children, but the gender of the younger one had only been confirmed as female by former NBA star Denis Rodman after he visited Pyongyang. The ex-basketball star called his “friend” the dictator a “good dad”.

Leadership in the hermit kingdom has passed to a male heir ever since Kim Jong-un’s father, Kim Il-sung, took control in 1948.

State mythology says that the “party and revolution must be carried eternally by the Baekdu bloodline”.

The lineage is named after a volcano on the Chinese border that is considered sacred by the Korean people. It was also the base of Kim Il-sung’s guerilla operations against the Japanese.

Given the Game Of Thrones-style plotting that is rife throughout the court of Kim, he has so far dispatched two relatives who could pose a counterclaim for the throne of Pyongyang.

In 2013, Kim had his uncle, Jang Song-thaek, executed after rumours got back to him that his uncle was trying to orchestrate a coup to bring in his older half-brother Kim Jong-nam.

Then, on Valentine’s Day this year, Jong-nam was poisoned in a Malaysian airport.

Kim’s half-brother had fallen out of favour with the regimen after being caught trying to sneak into Disneyland.

News of Kim’s family comes the same day he detonated a sixth nuclear bomb, triggering an artificial earthquake ten times larger than any of the rogue nation’s previous tests.

The 6.3-magnitude ‘quake’ would be the largest caused by a nuclear test from the country — and it came just hours after the tubby tyrant Kim Jong-un’s regimen claimed he had watched a hydrogen bomb being loaded onto an intercontinental ballistic missile.

North Korea confirmed on state media they had conducted a hydrogen bomb test, saying it was a “perfect success”. They added the H-bomb can be loaded onto an intercontinental missile.

The test is a direct challenge to US President Donald Trump, who hours earlier had talked by phone with Japanese Prime Minister Shinzo Abe about the “escalating” nuclear crisis in the region and has previously vowed to stop North Korea developing nuclear weapons that could threaten the United States.

The Korea Meteorological Administration initially reported “an artificial tremor” at 12.36pm local time in the North Hamgyeong Province, from a site used for nuclear testing by the North Korean regimen.

The US Geological Survey and Chinese authorities both confirmed the tremor, with South Korea’s weather agency later revising the artificial quake to 5.7 magnitude.

North Korea’s previous nuclear tests caused tremors just over 5 on the Richter scale — one tenth the magnitude of the current test — suggesting the device being tested this time was significantly more powerful.

This story originally appeared in The Sun and has been republished here with permission.