• Name: Carlyle, John Aitken (Jack)
• Gender: Male
• Birth Date: 7  July  1801
• Death Date: 15  September  1879
• Occupation: physician
• Occupation: writer

John was the brother of Thomas Carlyle. He graduated MD from the University of Edinburgh in 1826. He later tried to earn a living from writing in London. He attended William Hazlitt when Hazlitt was dying. He spent a number of years working as a travelling physician to the aristocracy, a period which included a seven year stint in Italy. He married well and devoted himself to literary pursuits in later life.

Godwin's one entry is to meeting the Carlyles (noting that they were from Edinburgh) in 1831. For a full account of the visit, from Thomas Carlyle's point of view, see his entry.

• DNB

This table lists the people this person is most frequently noted with in the diary.