cédille

Non-PRO français vers gallois Autre Linguistique

What is the Welsh word for the cedilla "ç" (French: cédille). I have been researching for hours and cannot find anything. I have found names for all the other accent marks I need. I tried "hook under the c" etc. And Welsh-French pages but I cannot see what it's called. If anyone knows, please help. This is not for a paid project or job, it's just for a post/article I am writing. Diolch yn fawr.