As we all know, Cid never showed up in FF1. But I have a growing suspicion that the famous Dr.Unne was a "prototype" for Cid. Here's my arguments:
Unne obviously has a quite high self-esteem (and he should have!), and I believe that most of the Cids I have seen in any FF this far has that too.
Of course, Unne is obviously a language genius (teaching the Light Warriors the ancient language Lefeinish in a second with only an old slab is quite amazing if you ask me), and Cid is an engineering genius, but the fact that they're very good at what they do is very similar.
Unne has an important role to play in FF1, and so does Cid in most FFs.
The title "Dr" is used on Cid some times (in FF5 for example).
Well, what do you think?