Some of the names above did manufacture C41 films while some manufactured Colour film based on the old Agfacolor process (pre C41) This Agfacolor process is now obsolete, and for a good reason. It couldn't keep up with colour, quality and grain of the modern C41 films.
So the list is not really a correct representation of color film manufacturers.
- Orwo 35 mm was old Agfacolor based until the late 1980s. They did manufacture some C41 and then rebadged, Ferrania & Konica 35mm film.
- Lucky C41 35mm was partnered with Kodak for a while.
- Polaroid C41 35mm was rebadged Agfa-Gevaert, Konica, Ferrania.
- Efke 35mm was old Agfacolor based and then C41 was rebadged Ferrania & Konica.
- Era C41 35mm was made in China, so I presume by Lucky.
- Forte 35mm was old Agfacolor based and C41 was rebadged Ferrania, Agfa-Gevaert, Konica.
- Fuda C41 35mm was made in China, so I presume by Lucky.
- Ilfocolor C41 35mm, from the early 1980s to mid1990 (?) was rebadged Konica, Ferrania, Agfa-Gevaert.
So as we can see, C41 film manufacture is not simple and easy to do. If it was, there would be more companies doing it.