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.
Francis Taylor, 1st Baron Maenan
Taylor was invested as a Knight Commander of the Order of the British Empire (KBE) in 1918 and promoted to Knight Grand Cross (GBE) in 1929. For his services to the judiciary he was raised to the peerage as Baron Maenan, of Ellesmere in the County of Shropshire, on 29 June 1948, then aged 93 and the oldest person ever to be made a peer.