Like in
Dueling Wizards I you all are encouraged to make families yourselves!
Last time that thing worked just fantastically as it eased Day1 and in a way Day2 but still was left to its own in the end. And how much fun it offered to the players...
So just propose marriages or negotiate for sister-/brotherhood or deal / suggest to be a father / mother, a children or an aunt or an uncle of someone... or whatever you come by!
The less we have "unconnected" persons the better. Just brave yourselves to it!