The rightful heir should obtain his rightful inheritance.
He claims to be the rightful heir.
He claimed that he was the only rightful heir.
The rightful heir, keeping his ancestry darkly secret, a necessity to preserve his life.
But he considered himself the true ruler of Egypt as well, the rightful heir to the spiritual traditions practiced by pharaohs such as Ramses II and Thutmose III.
The division of an estate or property among rightful heirs.