When creating a dynasty, It's not possible to add distant family. My king/queen needs to be friends with every single person in the family tree, even the infants and toddlers to add them. My legacy is 25 vampires, my king can't be friends with all of them to add them . This must be a bug.
I'm not using any mods. I'm on PC.
Edit By crinrict: Added Tag to Title, adjusted title