Whew! I just counted and we have 69!!! Most of them are deceased, but wow... that's a lot! To the best of my knowledge, these honorary members do not go through initiation, however. We do not perform initiation at our Triennial Conference, so if they were, it would have had to be through a collegiate chapter, and that just seems unlikely.
We also have National Patrons and Patronesses. What the difference is, exactly, I don't know, other than that there can be male patrons, whereas there are no male honorary members (that I saw at least) By a rough visual count, there are probably 100 of these.