Dukes in the United Kingdom
Duke, in the United Kingdom, is the highest-ranking hereditary title in all four peerages of the British Isles. A duke thus outranks all other holders of titles of nobility (marquess, earl, viscount and baron).
Peerages in the United Kingdom
This right, entitlement or "title", began to be granted by decree in the form of a Writ of Summons from 1265 and by Letters Patent from 1388. Additionally, many holders of smaller fiefdoms "per baroniam" ceased to be summoned to parliament, resulting in baronial status becoming personal rather than territorial. Feudal baronies had always been hereditable by primogeniture, but on condition of payment of a fine, termed "relief", derived from the Latin verb "levo" to lift up, meaning a "re-elevation" to a former position of honour. Baronies and other titles of nobility became unconditionally hereditable on the abolition of feudal tenure by the Tenures Abolition Act of 1660, and non-hereditable titles began to be created in 1876 for Law Lords, and in 1958 for Life Peers.