Crusader Kings II

[Closet_Skeleton]

So, my starting Duke finally died at 71 years old. His son, the new Duke, is now 50. Ormond went to my second son for some reason though.

Gavelkind.

I successfully fabricated a claim and then conquered the little noodly county to the north (Leister?) but before I could give it to my son, the duke died and now some random guy has it, so I'll probably need to revoke it.

No need to revoke it really. When your king of Ireland you'll want somebody to give the duchy of Leinster to. Its better to have some random guy as a vassal then a brother with a claim on your title.

You can own every county in Ireland in your personal demesne. But that requires you to get your son a stewardship education when really you want a diplomatic one. Its just too much hassle, you won't need the money after you've got 5 fully upgraded counties and if you're diplomacy is high enough you can get away with taxing feudal vassals anyway.