Primary

• Treize Khushrenada Friend of Zechs Marquise
• Treize Khushrenada Nephew of Duke Dermail
• Treize Khushrenada Cousin of Dorothy Catalonia

Extended

• Duke Dermail Grandfather of Dorothy Catalonia
• Duke Dermail Uncle of Treize Khushrenada
• Dorothy Catalonia Granddaughter of Duke Dermail
• Dorothy Catalonia Cousin of Treize Khushrenada
• Zechs Marquise Older Brother of Relena Darlian
• Zechs Marquise Friend of Treize Khushrenada
• Zechs Marquise Husband of Lucrezia Noin
• Zechs Marquise Brother-in-law of Heero Yuy