I really don't quite understand where DZsaigirl was coming from with her comments because every chapter has it's own traditions. While line numbers and names do not have a significance to APO they do have a special meaning to the people who use them. It's one of those things that you have to be in it to truly understand and appreciate it. Like for instance, I was the #2 of my line. I have a bond with ALL #2's, I think that they're the best
. That's just how I feel. It takes a special person to be a #2.
But if you examine other traditions of chapters i.e. family trees, they have no direct relevance to APO but you didn't mention them in your post.