There have been several dukes whose titles match their surnames.
These include Frederick Schomberg, a German-born general who, at various times, commanded forces for France, Brandenburg and Portugal. In 1673 he was invited to England to plan and lead an invasion of Holland, which was cancelled. He later did the opposite, accompanying William III in the Dutch "invasion" of England and was killed at the Battle of the Boyne in July 1690. In 1689 he was created Duke of Schomberg, in the peerage of England.
Phillip Wharton was created Duke of Wharton, in the peerage of Great Britain, at the age of 19, in 1718.
Charles Lennox, the natural son of Charles II, was created Duke of Lennox, in the Scottish peerage, in 1675.
In Scotland, if a name and title are the same the phrase "of that ilk", meaning of the same name or place, is sometimes used. Sir Iain Moncrieffe, baron of East Moncrieffe, for example, was known as Moncrieffe of that Ilk.