Royal dukedoms in the United Kingdom
In the British peerage, a royal duke is a member of the British royal family, entitled to the titular dignity of prince and the style of "His Royal Highness" who holds a dukedom. Dukedoms are the highest titles in the British roll of peerage and the holders of these particular dukedoms are Princes of the Blood Royal. The holders of the dukedoms are royal not the titles themselves. They are titles created and bestowed on legitimate sons and male-line grandsons of the British monarch, usually upon reaching their majority or marriage. The titles can be inherited but cease to be called "royal" once they pass beyond the grandsons of a monarch. As with any peerage, once the title becomes extinct, it may subsequently be recreated by the reigning monarch at any time.
List of peerages inherited by women
In the peerages of the British Isles, most titles have traditionally been created for men and with remainder to male heirs. However, some titles are created with special remainders to allow women to inherit them. Some of the oldest English baronies were created by writ and pass to female heirs when a peer dies with daughters and no sons, while some titles are created with a man's family in mind, if he is without sons and unlikely to produce any. The following is a list of women who have inherited titles with the British peerages.