You need a ruler from the same dynasty as another country to be able to form a Personal Union via war.

So how exactly can I raise my chances to get rulers from the same dynasty between me and another country?

Obviously you have to have a royal marriage, but is it pure luck from there or is there anything I can do?

How exactly does the game decide which dynasty a new ruler will belong to?

1 Answer 1


Having a higher prestige then your royal marriage partners and have a positive relations. When their King/Queen died without a heir then a Noble from your dynasty takes over throne.

  • Its mostly a luck based mechanic. The only people who it is remotely reliable for is Austria because they have built in bonuses to it.
    – Lawton
    Jun 24, 2014 at 3:39

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