- Brother to Romano, Seborga, and Emilia-Romagna.
- Romano is older. Seborga is youngest.
- Germany and Prussia are brothers.
- Prussia is older.
- Brother to Ukraine and Belarus.
- Ukraine is eldest, Belarus is youngest.
- Adoptive brother to Estonia and Latvia.
- Lithuania is eldest, Latvia is youngest.
- Step-brother to Liechtenstein
- Switzerland is eldest, Liechtenstein is youngest.
United Kingdom (England)
- Brother to Sealand.
- Half-brother to Scotland, Wales, Ireland (Eire) and Northern Ireland.
- Ireland (Eire) is eldest, then Scotland, then Wales, then UK/England, then Northern Ireland, and Sealand is youngest.
- Cousin to Australia and Wy
- Brother to Hong Kong
- China's eldest, Hong Kong youngest
United States of America
- Twin of Canada
- America is older
- Cousin to Mexico
- Brother to Wy
- Australia is eldest, Wy is youngest
- Cousin to United Kingdom