In Lois Lowry's dystopian novel The Giver, Jonas's baby brother is named Gabriel.
Gabriel is a newchild who struggles to sleep through the night and gain weight according to the community's standards. Jonas's family agrees to care for him temporarily, and Jonas develops a strong emotional attachment to the infant.
Gabriel's presence becomes crucial to the plot because the community permits underperforming newchildren to be released. Jonas eventually decides to flee with Gabriel rather than allow him to face that fate. Their journey exposes the cruelty hidden beneath the community's orderly language and routines.
The name Gabriel is easy to confuse with other children in Lowry's series, particularly Caleb, a child mentioned in connection with an earlier family tragedy. The Giver was published in 1993 and won the 1994 Newbery Medal. It is the first book in a loosely connected quartet that also includes Gathering Blue, Messenger, and Son.