I seem to recall that SE had an actual Twelve relationship 'flow chart' on the original FFXIV 1.0 website around the time of launch, but that disappeared years ago and I've never seen it listed anywhere since. The only other thing similar to that is this basic one on the FF Wiki:


I don't think that one is actually official though, but fan made. It does seem however to follow closely the style of the 'original' one that I mentioned previously, what I can remember of it that is.