William Herbert, 6th Earl of Pembroke, 3rd Earl of Montgomery (c. 1641 – 8 July 1674) was an English

England and Wales

England and Wales is a jurisdiction within the United Kingdom. It consists of England and Wales, two of the four countries of the United Kingdom...

 nobleman and politician who succeeded to the titles on 11 December 1669 on the death of his father.

Brought up in Wiltshire

Wiltshire

Wiltshire is a ceremonial county in South West England. It is landlocked and borders the counties of Dorset, Somerset, Hampshire, Gloucestershire, Oxfordshire and Berkshire. It contains the unitary authority of Swindon and covers...

 at Wilton House

Wilton House

Wilton House is an English country house situated at Wilton near Salisbury in Wiltshire. It has been the country seat of the Earls of Pembroke for over 400 years....

, he was the son of Philip Herbert, 5th Earl of Pembroke

Philip Herbert, 5th Earl of Pembroke

Philip Herbert, 5th Earl of Pembroke, 2nd Earl of Montgomery , succeeded to the titles in 1649 on the death of his father, also called Philip Herbert....

, by his marriage to Penelope Naunton, the daughter of Sir Robert Naunton

Robert Naunton

Sir Robert Naunton was an English writer and politician who sat in the House of Commons at various times between 1606 and 1626.-Life:...

, Secretary of State

Secretary of State

Secretary of State or State Secretary is a commonly used title for a senior or mid-level post in governments around the world. The role varies between countries, and in some cases there are multiple Secretaries of State in the Government....

 to King James I

James I of England

James VI and I was King of Scots as James VI from 24 July 1567 and King of England and Ireland as James I from the union of the English and Scottish crowns on 24 March 1603...

 and of Penelope Perrot, a daughter of Sir Thomas Perrot and of Lady Dorothy Devereux

Dorothy Percy, Countess of Northumberland

Dorothy Percy, Countess of Northumberland was the younger daughter of Walter Devereux, 1st Earl of Essex by Lettice Knollys, and the wife of Henry Percy, 9th Earl of Northumberland.-Family:...

 (later Countess of Northumberland), whose parents were the famous Earl of Essex

Walter Devereux, 1st Earl of Essex

Walter Devereux, 1st Earl of Essex, KG , an English nobleman and general. From 1573 until his death he fought in Ireland in connection with the Plantation of Ulster, where he ordered the massacre of Rathlin Island...

 and Lettice Knollys

Lettice Knollys

Lettice Knollys , Countess of Essex and Countess of Leicester , was an English noblewoman and mother to the courtiers Robert Devereux, 2nd Earl of Essex and Lady Penelope Rich; through her marriage to Elizabeth I's favourite, Robert Dudley, Earl of Leicester, she incurred the Queen's undying...

.

His mother died before 1647, when he was a small child.

In September 1658, he was granted a pass to travel overseas. He 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 Glamorgan

Glamorganshire (UK Parliament constituency)

Glamorganshire was a parliamentary constituency in Wales, returning two Members of Parliament to the British House of Commons. The Redistribution of Seats Act 1885 divided it into five new constituencies: East Glamorganshire, South Glamorganshire, Mid Glamorganshire, Gower and Rhondda.- MPs...

 between 1661 and his elevation to the House of Lords

House of Lords

The House of Lords is the upper house of the Parliament of the United Kingdom. Like the House of Commons, it meets in the Palace of Westminster....

 in 1669. After he came into his father's great estates, especially in Wiltshire and in Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

, Pembroke was known to exercise a decisive electoral influence in many places. However, with the Cavalier Parliament

Cavalier Parliament

The Cavalier Parliament of England lasted from 8 May 1661 until 24 January 1679. It was the longest English Parliament, enduring for nearly 18 years of the quarter century reign of Charles II of England...

 enduring from 1661 until 1679, he had few opportunities to wield this influence directly in elections to the House of Commons

House of Commons of England

The House of Commons of England was the lower house of the Parliament of England from its development in the 14th century to the union of England and Scotland in 1707, when it was replaced by the House of Commons of Great Britain...

. From 1665 to 1674, he was Custos Rotulorum of Wiltshire

Custos Rotulorum of Wiltshire

This is a list of people who have served as Custos Rotulorum of Wiltshire.* Sir Richard Lyster bef. 1544–1553* Sir John Thynne bef. 1558–1580* Henry Herbert, 2nd Earl of Pembroke bef. 1584–1601...

.

Pembroke died unmarried on 8 July 1674 and was succeeded by his brother, another Philip Herbert.