Primary

• Thanatos Twin Brother of Hypnos
• Thanatos Son of Nyx
• Thanatos Younger Brother of Charon

Extended

• Nyx Mother of Hypnos
• Nyx Mother of Thanatos
• Nyx Daughter of Chaos
• Nyx Mother of Charon
• Charon Older Brother of Thanatos
• Charon Older Brother of Hypnos
• Charon Son of Nyx
• Hypnos Twin Brother of Thanatos
• Hypnos Younger Brother of Charon
• Hypnos Son of Nyx