罗山费氏
├─ 费伯仁
│ └─ 伯仁姑（费氏） ↔ 刘焉（益州牧，刘璋之父）
│ └─ 刘璋（益州牧）
│ └─ 刘璋女 ↔ 费观（费祎族父，裨将军）
│
└─ 费祎（罗山人，蜀汉丞相之一）
├─ 费承（黄门侍郎）
├─ 费恭 ↔ 蜀后主刘禅之女（公主）
└─ 费祎长女 ↔ 刘璿（蜀太子，刘禅长子）
蜀汉皇室（刘备系）
刘备
├─ 刘禅（后主）
│ ├─ （皇后）张飞长女
│ ├─ （皇后）张飞次女 ←─ 两位张氏为刘禅正妻
│ ├─ 太子刘璿 ↔ 费祎长女 ←─ 费氏与皇室再联姻
│ ├─ 公主① ↔ 诸葛瞻（诸葛亮子）
│ ├─ 公主② ↔ 关统（关羽孙、关兴子）
│ └─ 公主③ ↔ 费恭（费祎子） ←─ 费氏与皇室第三次联姻
└─ 刘理（安平王，刘备次子） ↔ 马超女
其他主要家族
诸葛亮 ──子→ 诸葛瞻 ↔ 刘禅公主①
关羽 ──子→ 关兴 ──子→ 关统 ↔ 刘禅公主②
张飞 ──两女→ 刘禅皇后（长、次）
马超 ──女→ 刘理王妃
Summary of Key Relationship Network Points
The Luo Mountain Fei Clan intermarried with the highest ruling group of Shu Han across three generations:
• The Fei Boren family formed a marriage alliance with Liu Zhang (Governor of Yi Province).
• Fei Guan married Liu Zhang's daughter, making him both Liu Zhang's son-in-law and a clan elder of Fei Yi.
• Two of Fei Yi's children married into the families of Liu Shan and his son, with Fei Gong even marrying a princess.
Through the marriages of Liu Shan's princesses, the Fei clan indirectly formed marital ties with the descendants of two major meritorious officials, Zhuge Liang and Guan Yu.
The Liu Bei lineage further solidified internal alliances through marriages with daughters from the Ma Chao and Zhang Fei families.
In summary, the Luo Mountain Fei Clan established a tight marital network both vertically (Boren → Yi) and horizontally (with the Liu imperial family, and the Zhuge, Guan, Zhang, and Ma families), making it one of the core "relationship hubs" in Shu Han politics.