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
Ibai	-	Basque
Nit	-	Egyptian Mythology
Duke	[dju:k]
Pius	PIE-əs (English)	Late Roman
Shui	-	Chinese
Miquel	-	Catalan