Regarding the name ‘ciera’ and its variants, Ford had a car model in the UK (where I live) which was named the Sierra. So much for originality - as noted in the original report.
2nd point - I believe that one of the other motives behind coming up with synthetic names was to avoid using words that are either foolish or vulgar in some foreign language. I have heard various tales (possibly apocryphal) of manufacturers going seriously wrong on this point.
3rd point: iirc Mitsubishi had a small car named ‘Colt’, which came in a range named ‘Starion’ (think Japanes pronunciation). Racist I’m sure, but makes me laugh