Thomas Madryn 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...

  in 1654. He fought in the Parliamentary army 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...

.

Madryn was the son of either Robert Madryn, High Sheriff in 1603 or Griffith Madryn, High Sheriff in 1633. He was a J.P.

Justice of the Peace

A justice of the peace is a puisne judicial officer elected or appointed by means of a commission to keep the peace. Depending on the jurisdiction, they might dispense summary justice or merely deal with local administrative applications in common law jurisdictions...

 for Carnarvonshire and was 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...

 in 1642. In the Civil War, he was a colonel in the Parliamentary army. He was High Sheriff of Carnarvonshire again in 1648 and 1649. He was appointed commissioner for sequestration in North Wales on 18 February 1650 and held the position until 1659. He was appointed Custos Rotulorum of Anglesey on 27 July 1653.

In 1654, Madryn 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 Carnarvonshire  in the First Protectorate Parliament

First Protectorate Parliament

The First Protectorate Parliament was summoned by the Lord Protector Oliver Cromwell under the terms of the Instrument of Government. It sat for one term from 3 September 1654 until 22 January 1655 with William Lenthall as the Speaker of the House....

. He stood for parliament again for Carnarvonshire in 1659 and petitioned after being unsuccessful.

Following the Restoration, Madryn was High Sheriff of Carnarvonshire again in 1666.