I have had like 8 bazillion people remind me of this; I actually addressed it in another post in that I personally consider anything risen by the Scourge to still be 3rd gen just because the methods are basically the same (so basically it comes down to if you consider the generations to be a timeline thing or a magic type/political thing). I was referring to the possibility of player-type DKs raising people similar to themselves— something the Ebon Blade would frown upon, but extremely prevalent in RP (which is what most of my posts are geared toward).
But yes, that is a thing that happened and is pretty good reference for a post-scourge backstory if you don’t feel like doing the Acherus thing nearly five years after it happened.