Cid inherits the title, I believe. So he wouldn't have been a member of Tantalus, but rather an heir to the throne.Originally posted by Darkness
Or another theory is Cid was a member of Tantalus before becoming the Regent of Lindblum.
<longshot> Cid was always having affairs and whatnot. Depending on the ages involved, is there a chance that Baku could be an illegitimate son? </longshot> I wouldn't be surprised if Cid had 'done the deed' with a Burmecian gal at some point, and produced the hybrid offspring.
It's not very likely, but the game doesn't tell you anything, so bring on the crackpot theories!