Here's how it works: I list the names of parents and any existing children. The next person names the next child for each family based on the names already established. The next person builds on the new list and so on.
Parents:
James and
JulieChildren:
Jacob Elijah,
Parents:
Rob and
EileenChildren:
Emily Ann,
Connor Evan,
Parents:
Theo and
KathyChildren:
Enzo Lysander,
Felix Hadrian
Parents:
Greg and Mary-Ellen
Children:
Betsy Caitlyn,
Alex Robert,
Parents:
Vincent and
SaraChildren:
River Justice,
Lilac Grace,
Parents:
Ned and
TammyChildren:
Josephine Victoria,