What is the name for a french accent mark?

There isn't one specific name for all French accent marks. They have different names depending on the specific mark:

* Acute accent: "accent aigu"

* Grave accent: "accent grave"

* Circumflex accent: "accent circonflexe"

* Cedilla: "cédille"

* Diaeresis: "tréma"

However, you can generally refer to them collectively as "accents" or "accent marks" in English.