Principality is a principal reality & a principle reality.
A principal reality is the first or highest reality.
A principle reality is a reality based on the truth of a belief.
In a family a principle is decided by the principal.
The father is the principal figure in the family.
A father is the head of a principality, whether they are called a prince or not is irrelevant.
The beliefs of the head of the household become the law in that family.
They are called family principles.
The family behaves according to their principal beliefs, which are their principles.
A family member acts or reacts on principle when someone crosses the family boundaries.
A principality is caused by the principal beliefs that determine the behaviour that is the principle truth of that family.
The highest principal beliefs become the principle truths that creates a principality in every family.