William Thomas 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...

  from 1640 to 1644.

Thomas was the son of Sir William Thomas but became a Queen's ward in 1593. He owned lands in Carnarvonshire, Anglesea and Carmarthen with his main house in Carnarvonshire. In 1638 he 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 December 1640, Thomas 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 Carnarvon 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 Parliament on 5 February 1644 and became Groom of the Privy Chamber to the Queen Consort on 14 February 1644. He componded £780 for his estates.