I’ll suggest names for three siblings, two boys and a girl, that I think go well together. The next person gets rid of the first name and adds a name for the opposite gender that could go well with the other two. The next person does the same thing to the new set.
For instance, I could write [name]Casen[/name], [name]Jayda[/name], and [name]Tyler[/name]. The next person might post [name]Jayda[/name], [name]Tyler[/name], and [name]Bailey[/name]. The next might post [name]Tyler[/name], [name]Bailey[/name], and [name]Brandon[/name]. The next might post [name]Bailey[/name], [name]Brandon[/name], and [name]Breanna[/name]. And so on.
The first sib set:
[name]Henry[/name], [name]Abigail[/name], and [name]Theodore[/name].