Looking at the Family Tree (good work as always TC) it seems our Empire is filled with a bunch of confirmed bachelors. Outside of the Swabians, none of the latest generation is marrying. We currently have enough avatars, I'm just worried a bit about the future.

I've given up trying to understand the various family tree mechanics. I guess there's not much to do about it. The only thing I could think of would be to arrange "accidents" for some of the avatars who won't be claimed.