Isaac Penington (1616 - October 8, 1679) belonged to the earliest followers of the quake movement founded by George Fox.
Penington was the eldest son of the Puritein Isaac Penington, who was Mayor of London and was part of the government of Oliver Cromwell.
Penington married the young widow Mary Springett, who had lost her husband at the siege of Arundel, and they had five children. His step daughter Gulielma Springett married William Penn. Around 1657, after hearing George Fox, the couple joined the quakers.
As of 1661, as many quakers, Penington spent a number of periods in prison because of his beliefs and the accompanying views. A few times, the charge was that he had refused to oath, what the quakers did not do in principle. He was also convicted of attending a quakers meeting, which was forbidden by the law of 1664.
Penington wrote extensively about the quaker movement. His full work was first published in 1681. His wife wrote a report about the periods he spent in prison. She died in 1682. Literature
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