You have been defeated by the rightful heir of your household.
She has become her father's true and rightful heir.
John, who believed his brother to be the better man and rightful heir, decided to balance business needs with humanitarian goals.
He hasn't a prayer of convincing the family he's the rightful heir.
Kid stuff first - changed at birth - really the rightful heir - that sort of thing.
He was, after all, the "rightful" heir to his father.
He will find it difficult to make the rightful heir disappear, as have others in the past.
Wear it, and you will be recognized as the rightful heir to the throne.
A handsome young man who is the rightful heir to the throne.
By the book's end, the child has realized that she is the couple's daughter, and therefore, the rightful heir to the throne.