Primogeniture
A Dictionary of Law · William C. Anderson · 1889
A Dictionary of Law
The rule of descent, in English law, that of two or more males in equal degree, the eldest inherits; while females all inherit together.
Postremogeniture.
The right of the youngest son to inherit.^ When the emperors began to create honorary feuds, or titles of nobility, it was found necessary, in order to preserve their dignity, to make them impartible, and in consequence descendible, to the eldest son alone. This example was further enforced by the inconveniences which attended the splitting of estates.'