North Korea is rather exceptional though. Few dictatorships manage even one smooth succession, let alone two.

Monarchies

It depends on one's definition of dictatorship. I personally do not believe, for instance, the British Crown is one such instance.

	▲	j-bos 3 hours ago \| parent [-]
		Besides that, multiple ways to read this. "Monarchies" could've been a reference to pre modern monarchies of which many made it through at least 3 successions. Or as a correction to the upper comment, saying that the Kim's are more monarchy than plain dictatorship.