There have been two Baronetcies created for persons with the surname Williamson, one in the Baronetage of England and one in the Baronetage of the United Kingdom.

The Williamson Baronetcy, of East Markham in the County of Nottingham, was created in the Baronetage of England on 3 June 1642 for Thomas Williamson. He was a supporter of the Royalist cause in the Civil War

English Civil War

The English Civil War was a series of armed conflicts and political machinations between Parliamentarians and Royalists...

, which loyalty resulted in the sequestration

Sequestration (law)

Sequestration is the act of removing, separating, or seizing anything from the possession of its owner under process of law for the benefit of creditors or the state.-Etymology:...

 of all his Nottinghamshire estates, for which he compounded at a cost of £3400.

The family removed to County Durham as a consequence of marriage and from the 18th century the family seat was Whitburn

Whitburn, South Tyneside

Whitburn is a village in South Tyneside, on the coast of North East England. It lies just to the north of the City of Sunderland in the ceremonial county of Tyne and Wear. Until 1974, when the Local Government Act 1972 came into being, it was part of County Durham...

 Hall, near Sunderland ( the house was demolished in 1980). The fourth Baronet served as High Sheriff of Durham 1723-1747. The fifth (1747-88) and sixth Baronets (1789-1810) also served in that office. The seventh Baronet sat as Whig 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,...

 (MP) for County Durham

County Durham (UK Parliament constituency)

Durham or County Durham was a county constituency in northern England, which elected two Members of Parliament to the House of Commons from 1675 until 1832.- History :...

 1831-2, and Sunderland

Sunderland (UK Parliament constituency)

Sunderland was a borough constituency of the House of Commons, created by the Reform Act 1832 for the 1832 general election. It elected two Members of Parliament by the bloc vote system of election until it was split into single-member seats of Sunderland North and Sunderland South for the 1950...

 1847 and was High Sheriff in 1840.. The eighth Baronet represented Durham North

North Durham (UK Parliament constituency)

North Durham is a county constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament by the first past the post system of election....

 in the House of Commons

British House of Commons

The House of Commons is the lower house of the Parliament of the United Kingdom, which also comprises the Sovereign and the House of Lords . Both Commons and Lords meet in the Palace of Westminster. The Commons is a democratically elected body, consisting of 650 members , who are known as Members...

 1864-74. The ninth Baronet was High Sheriff in 1904. The title became extinct on the death of the eleventh Baronet in 2000.

The Williamson Baronetcy, of Glenogil in the County of Forfar, was created in the Baronetage of the United Kingdom on 29 July 1909. For more information on this creation, see the Baron Forres

Baron Forres

Baron Forres, of Glenogil in the County of Forfar, is a title in the Peerage of the United Kingdom. It was created in 1922 for the Scottish businessman and Liberal politician Sir Archibald Williamson, 1st Baronet. He had already been created a Baronet in 1909. Williamson was the son of Stephen...

.

Williamson Baronets, of East Markham (1642)

• Sir Thomas Williamson, 1st Baronet (1609-1657)
• Sir Thomas Williamson, 2nd Baronet (1636-1703)
• Sir Robert Williamson, 3rd Baronet (d. 1707)
• Sir William Williamson, 4th Baronet (1681-1747)
• Sir Hedworth Williamson, 5th Baronet (c. 1710-1788)
• Sir Hedworth Williamson, 6th Baronet (1751-1810)
• Sir Hedworth Williamson, 7th Baronet
  Sir Hedworth Williamson, 7th Baronet
  Sir Hedworth Williamson, 7th Baronet was an English Whig politician who sat in the House of Commons in two periods between 1831 and 1852.Williamson was the son of Sir Hedworth Williamson, 6th Baronet...
  
   (1797-1861)
• Sir Hedworth Williamson, 8th Baronet
  Sir Hedworth Williamson, 8th Baronet
  Sir Hedworth Williamson, 8th Baronet was a British diplomat and Liberal Party politician who sat in the House of Commons from 1864 to 1874....
  
  (1827-1900)
• Sir Hedworth Williamson, 9th Baronet (1867-1942)
• Sir Charles Hedworth Williamson, 10th Baronet (1903-1946)
• Sir Nicholas Frederick Hedworth Williamson, 11th Baronet (1937-2000)