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
Ioachim	-	Judeo-Christian Legend
JÓAnnes	-	Faroese
Belinda	bə-LIN-də	English
Hinds	[haindz]
Gervase	JUR-vəs	English (Rare)
Cybill	SIB-əl	English (Rare)