According to the first line of the Wikipedia page they changed the name in 2018
https://en.wikipedia.org/wiki/Kia_Ceed
So the first two generations would be "cee'd" and the 3rd one (2018+) "Ceed"

https://www.veikl.com/documents/kia/cee'd?Page=1&PageSize=25&Sort=2
Brochures seem to use cee'd too, like badges on cars..at least for first two generations

Also, European origin could be added to them (like the i30)

Has this been discussed here before? I tried a site search, but the search engine won't work with three letter words...

Is the spelling of Kia Cee'd correct on our pages? Up until the Ceed. Brochures seem to use cee'd rather than Cee'd. Badges seem to read cee'd. I know just a few other cars with only lowercase letters in model name.

On the other hand, brochures tend to use KIA...