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.
Baron Teynham
Baron Teynham, of Teynham in the County of Kent, is a title in the Peerage of England and the Peerage of the United Kingdom. It was created in 1616 for Sir John Roper. His great-great-grandson, the fifth Baron, served as Lord Lieutenant of Kent. The latter's third son, the eighth Baron, married, as his second wife, Anne Barrett-Lennard, 16th Baroness Dacre. His eldest son from this marriage, the Hon. Charles Roper, was the father of Trevor Charles Roper, 18th Baron Dacre, and Gertrude Trevor Roper, 19th Baroness Dacre (see the Baron Dacre for more information). His youngest son from this marriage, Reverend Hon. Richard Henry Roper, was the great-great-great-grandfather of the historian Hugh Trevor-Roper, Baron Dacre of Glanton.