What are 9 proper nouns in the book The Giver?

Proper nouns found in the book 'The Giver' are:

JonasAsherChief ElderThe GiverThe Ceremony of TwelveDepartment of JusticeThe Receiver of Memory or The ReceiverThe Committee of EldersGabriel

A proper noun is the name of a specific person, place, thing, or a title.