LXA Associate Classes go by The Greek Alphabet as Our Chapters do.
Alpha, then from single to Alpha-Beta, Etc.
The whole problem is, it is many times not just on the Local Chapter Level, but at HQ Level also.
History and the paper work that covers it get lost in moves, suspensions or De-Chartering!
Modern Tech has helped a lot, but digging up those figures to get them data based is tuff!