Problems picking a name for group?

So I am going to what is called in spanish "Confirmación" it what you do after some years after taking your first Communion as to define your relationship with God. Part of the plan is to pick a name for the group, but I'm having trouble trying to come up with something symbolic. My idea to choose the name was something that represents that we are all different, but only together we can accomplish our objectives, somthing like a puzzle, but also I was thinking about stones (diiferent sizes and shapes) that to built a road you need stones to reach where you want to, and if one is missing then we can't get where we want to. Names that are related to those things is what I am asking. I really appreciate your help.