Thomas Blennerhassett was an English 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...

  at various times between 1584 and 1611.

Blennerhassett may have been the son of Richard Blennerhassett, a member of the Carlisle Council in 1569. In 1584, Blennerhassett 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 Carlisle

Carlisle (UK Parliament constituency)

Carlisle is a constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of Parliament by the first past the post system of election. It was a Labour seat from 1964 until 2010, although the Conservatives came close to victory in the elections in...

. He was re-elected MP for Carlisle in 1586. In 1597 he was mayor of Carlisle. He was elected MP for Carlisle again in 1604.