I am not sure if this has been done before, but I have not seen it. This is the nickname chain game. You jump from name to name based on a common nickname.
Example:
First Poster: [name_f]Elizabeth[/name_f]
Second Poster: [name_f]Elizabeth[/name_f] -> [name_f]Beth[/name_f] -> [name_f]Bethany[/name_f]
Third Poster: [name_f]Bethany[/name_f] -> [name_f]Annie[/name_f] -> [name_f]Annabelle[/name_f]
And so on and so forth… either gender is fine so you could go [name_f]Ellen[/name_f] -> [name_u]Lennie[/name_u] -> [name_m]Leonard[/name_m] (or whatever). Also if you get stuck its fine to repeat/go backward (“[name_f]Ellen[/name_f] -> [name_u]Lennie[/name_u] -> [name_m]Leonard[/name_m]” could be followed by “[name_m]Leonard[/name_m] -> [name_u]Lennie[/name_u] -> [name_f]Eleanor[/name_f]” or whatever)