If you marry a close relative (1st cousin or closer) there is a chance of your children gaining the inbred trait. My question is simple, as I accidentally ended up in a similar situation; My half brother Alfonso is king of France, and I am emperor of Hispania and married to his daughter and in line to inherit the HRE (the Salians somehow managed to shift succession law to agnatic-cognatic primogeniture and have ruled the HRE for 250 years and have very strong dynasty members). Anyway, my heir is inbred, weak, insane, and an imbecile, and for some reasons my assassins have failed to kill him. I am 65 and not getting any younger. I used the console, and it turns out the child is not actually mine anyway. He is the son of my wife and some random courtier descended from the Jimenas (I am the great great great grandson of El Cid) which raises this question; does the game use actual father or perceived father to determine wheather the child is "inbred"? I have triple checked, and the Jimena boy is not related in any way to me for five generations.

1 Answer 1


The game uses the actual father to determine genetic traits, including Inbred. It seems your wife is somehow blood-related to her boy toy. Keep in mind that this blood relation might also be through a child resulting from an affair, so you won't see it in the "official" family tree or dynasty tree.

Inbred also comes with a hefty health penalty. Inbred people rarely survive until adulthood. Weak also has a health penalty. So it is very likely that the problem will solve itself.

When you want to make sure that he does not inherit, refer to the question "How do I prevent my imbecile son from being an heir?". Should you still end up having to play as that abnormity, refer to "What methods of suicide cause the least amounts of collateral damage?" for how to quickly forward the crown to the next eldest brother.

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    I just confirmed this with console - apparently the girl was his secret bastard daughter... He apparently had an affair with her mother ~20 years ago and she was the result. Unacknowledged of course, but... So he was banging his daughter. Nice. Almost worthy of being made an honorary member of House Targaryen. Looking around at my other courtiers, he seems to be half of their father and that is not even counting those in my harlot wife's court whom he fathered. Time to arrange an accident... or 40. Well, time to keep trying anyway.
    – Jax
    Commented Sep 20, 2016 at 15:42
  • @DJMethaneMan That randy bastard perfectly matches the description of King Aegon IV Targaryen who banged his own unacknowledged daughter.
    – NSNoob
    Commented Nov 3, 2016 at 6:48
  • @NSNoob Ah, for that little extra sprinkle of Targaryen squick.
    – Jax
    Commented Nov 9, 2016 at 18:28

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