William Monson, 1st Viscount Monson (died ca. 1672) was one of the Regicide

Regicide

The broad definition of regicide is the deliberate killing of a monarch, or the person responsible for the killing of a monarch. In a narrower sense, in the British tradition, it refers to the judicial execution of a king after a trial...

s of King Charles I of England

Charles I of England

Charles I was King of England, King of Scotland, and King of Ireland from 27 March 1625 until his execution in 1649. Charles engaged in a struggle for power with the Parliament of England, attempting to obtain royal revenue whilst Parliament sought to curb his Royal prerogative which Charles...

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William Monson was son of Sir Thomas Monson. He was created Viscount Monson of Castlemaine (Irish peerage) in 1628 and knighted in 1633. He was elected M.P. for Reigate

Reigate (UK Parliament constituency)

Reigate 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.-Boundaries:...

 in 1640, 1645 and 1648. He was nominated as one of the king's judges, but only attended three sittings. After the restoration of the monarchy in 1660, he was sentenced by Parliament to degradation from his honours and titles and to be imprisoned for life. He died in the Fleet Prison

Fleet Prison

Fleet Prison was a notorious London prison by the side of the Fleet River in London. The prison was built in 1197 and was in use until 1844. It was demolished in 1846.- History :...

around 1672.