giving birth

[Jxrc]

you can only ever have six princes

Correct indeed.

Can be a pain in the neck when you have a king that has five brother who are all about the same age as he is because for as long as the five brothers are alive your king will not have any heir at all... If your king reaches its 60th birthday you might even end up in big trouble cause you'll then have a good chance that when his brothers become kings themselves they will have no son either and will reign for about three years each ....

Leant it the hard way when playing as Aragon I had a amazing string of princes who had all at least five stars with ok v&v ... After the eldest had died, I lost one excellent general every odd year and the youngest brother died when he was 52 or something (just remember it was rather an early exit) while the oldest heir was still 9 ... Tried a reload to see if I could manage to be a little luckier but I was the involve in rather serious wars with battles lasting about an hour each turn ... Fighting such battles knowing that I might just loose the campaign anyway was too much for me and I started another campaign with the HRE (one feature of that faction looked extremely appealing then )

Could be a solution to suicide or assassinate one of your princes (preferably the inbred unhinged loon)when that happens but I have never tried that myself ...