on (one's) own volition

Of one's own choice. No one told me to leave. I left early on my own volition. You failed this class on your own volition—don't try to blame it on me!

Common Names:

Name	Pronounced	Usage
Halvar	-	Swedish
Kaitlin	KAYT-lin	English (Modern)
Ljudmila	-	Slovene
Hardeep	-	Indian (Sikh)
Anupam	-	Indian, Hindi, Bengali
Kenshin	ken-sheen	Japanese