Sir James Thynne was an English landowner and politician who sat in 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...

  in two periods between 1640 and 1670.

Thynne was the eldest son of Sir Thomas Thynne

Thomas Thynne (died 1639)

Sir Thomas Thynne , of Longleat, Wiltshire, was an English landowner and member of parliament.Thynne was the son and heir of Sir John Thynne of Longleat, a knight of the shire, by his marriage to Joan Hayward, daughter of Sir Rowland Hayward, a Lord Mayor of London.Thynne first made his mark in May...

, of Longleat

Longleat

Longleat is an English stately home, currently the seat of the Marquesses of Bath, adjacent to the village of Horningsham and near the towns of Warminster in Wiltshire and Frome in Somerset. It is noted for its Elizabethan country house, maze, landscaped parkland and safari park. The house is set...

, Wiltshire. He was knighted at Berwick on 23 June 1639.

In November 1640, Thynne was elected 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 Wiltshire

Wiltshire (UK Parliament constituency)

Wiltshire was a constituency of the House of Commons of England from 1290 to 1707, of the House of Commons of Great Britain from 1707 to 1800 and of the House of Commons of the United Kingdom from 1801 to 1832. It was represented by two Members of Parliament , elected by the bloc vote...

 in the Long Parliament

Long Parliament

The Long Parliament was made on 3 November 1640, following the Bishops' Wars. It received its name from the fact that through an Act of Parliament, it could only be dissolved with the agreement of the members, and those members did not agree to its dissolution until after the English Civil War and...

. He was disabled from sitting in 1642.
In 1655 Thynne founded an almshouse at Longbridge Deverill. Following the Restoration, he was High Sheriff of Wiltshire

High Sheriff of Wiltshire

This is a list of High Sheriffs of Wiltshire.Until the 14th century the shrievalty was held ex officio by the castellans of Old Sarum.-To 1400:*1066: Edric*1067-1070: Philippe de Buckland*1085: Aiulphus the Sheriff*1070–1105: Edward of Salisbury...

 in 1661. Sir Christopher Wren

Christopher Wren

Sir Christopher Wren FRS is one of the most highly acclaimed English architects in history.He used to be accorded responsibility for rebuilding 51 churches in the City of London after the Great Fire in 1666, including his masterpiece, St. Paul's Cathedral, on Ludgate Hill, completed in 1710...

 advised him on improvements to the house at Longleat which included the great stairs and stone terrace. In 1664 he was re-elected MP for Wiltshire in 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...

 and sat until his death in 1670.

Thynne married Lady Isabella Rich, daughter of Henry Rich, 1st Earl of Holland

Henry Rich, 1st Earl of Holland

Henry Rich, 1st Earl of Holland was an English aristocrat, courtier and soldier.-Life:He was the son of Robert Rich, 1st Earl of Warwick and of Penelope Devereux, Lady Rich, and the younger brother of Robert Rich, 2nd Earl of Warwick...

 and his wife Isabel Cope. He died without issue and his nephew Thomas

Thomas Thynne (landowner)

Thomas Thynne was an English landowner of the family that is now headed by the Marquess of Bath and politician who sat in the House of Commons from 1670 to 1682. He went by the nickname "Tom of Ten Thousand" due to his great wealth...

succeeded to the estates.