- The title passes by inheritance to the eldest son.
- The estate went to the eldest son.
- The eldest son is the family's only provider.
- When the king died, his eldest son succeeded (to the throne).
- The right of the eldest child, especially the eldest son, to inherit the entire estate of one or both parents.
- On his death, the title passed to his eldest son.
- He is the eldest son and thus heir to the title.
- When the duke dies, his eldest son will succeed to the title.