Who were the hostages who did not come back alive?

Note: Ages are stated as of the day they died, or if not known, when they were kidnapped.

Sources: The accounts of how the hostages died are based on Israeli military sources, forensic evidence provided to the hostages' families and former hostages' accounts.

Photos from AP, GPO/Facebook, Hostages and Missing Families Forum, Hostage Families, IDF/X and Reuters