Thomas Glynn was a Welsh 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...

  variously between 1624 and 1640. He suppported the Parliamentary side in the English Civil War

English Civil War

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

.

Glynn was the son of Sir William Glynn of Glynllifon and his wife Jane Griffith, daughter of John Griffith of Cefnamwich. He was the brother of John

John Glynne (judge)

Sir John Glynne KS was a Welsh lawyer of the Commonwealth and Restoration periods, who rose to become Lord Chief Justice of the Upper Bench, under Oliver Cromwell...

 who also became an MP and a judge.

In 1622 Glynn served as High Sheriff of Caernarvonshire

High Sheriff of Caernarvonshire

This is a list of High Sheriffs of Caernarvonshire.The High Sheriff is the oldest secular office under the Crown. Formerly the High Sheriff was the principal law enforcement officer in the county but over the centuries most of the responsibilities associated with the post have been transferred...

 and in 1624 was then 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 Caernarvonshire

Caernarvonshire (UK Parliament constituency)

Caernarvonshire was a constituency of the House of Commons of the Parliament of England then of the Parliament of Great Britain from 1707 to 1800 and of the Parliament of the United Kingdom from 1801 to 1885 and from 1918 until 1950. It elected one Member of Parliament by the first past the post...

 and was re-elected in 1625. In April 1640, he was again elected MP for Caernarvonshire in the Short Parliament

Short Parliament

The Short Parliament was a Parliament of England that sat from 13 April to 5 May 1640 during the reign of King Charles I of England, so called because it lasted only three weeks....

. In the Civil War he supported the parliamentary side and was made governor of Caernarvon Castle after its surrender in 1646.

Glynn died in 1648. He was succeeded at Glynllifon by his son John.