party to

party to something

a participant in something; someone who is involved in something. I refuse to be a party to your dishonest plan!

Name	Pronounced	Usage
Zeno	-	Ancient Greek (Latinized), Italian
Marje	MAHRJ	English
Vergilius	-	Ancient Roman
Rameshwar	-	Indian, Hindi
Nikusha	-	Georgian
Vilhelmo	veel-HEL-mo	Esperanto