The Vaughan Baronetcy, of Nannau in the County of Merioneth, was a title in the Baronetage of Great Britain. It was created on 28 July 1791 for Robert Howell Vaughan. He was a descendant of Robert Vaughan

Robert Vaughan (antiquary)

Robert Powell Vaughan was an eminent Welsh antiquary and collector of manuscripts. His collection, later known as the Hengwrt-Peniarth Library from the houses in which it was successively preserved, formed the nucleus of the National Library of Wales, and is still in its care.-Biography:Vaughan...

, the antiquary. The second Baronet was Member of Parliament

Member of Parliament

A Member of Parliament is a representative of the voters to a :parliament. In many countries with bicameral parliaments, the term applies specifically to members of the lower house, as upper houses often have a different title, such as senate, and thus also have different titles for its members,...

 for Merioneth

Merioneth (UK Parliament constituency)

Merioneth, sometimes called Merionethshire, was a constituency in North Wales established in 1542, which returned one Member of Parliament to the House of Commons of the English Parliament, and later to the Parliament of Great Britain and of the United Kingdom...

 for over forty years. The title became extinct on the death of the third Baronet in 1859.

Vaughan Baronets, of Nannau (1791)

• Sir Robert Howell Vaughan, 1st Baronet (c. 1738-1792)
• Sir Robert Williames Vaughan, 2nd Baronet (c. 1768-1843)
• Sir Robert Williames Vaughan, 3rd Baronet (1803-1859)