Hence they are known as Princess Beatrice and Princess Eugenie of York. The grandson of a duke normally was known by his grandfather's third title. This title dates back to 1385. Her title was also granted with the privilege that it would descend to her male heirs. Once again, the eldest sons might take their father's secondary title.
Signatures follow the same rules as duke's children.
Earl Earls originated in Anglo-Saxon times when an earl was a local ruler. The oldest official earldom is the Arundel, which dates to 1433. The most significant earldom in England is the Shrewsbury title. Princess Margaret's son, for example is Viscount Linley until his father dies when he will become Earl Snowdon. This title was often used to reward service to the crown that warranted more recognition than a barony.