[5] Frances was the daughter of Elias Avery Lowe, a Lithuanian-American Jewish palaeographer, and Helen Tracy Lowe-Porter, an American translator and writer, along with Frances's four siblings (including the journalist and author Edmund Fawcett).
[7] In 1961 Johnson Wahl began studying English at Lady Margaret Hall, a college of Oxford University.
[9][10] Johnson Wahl was a professional portrait painter for Crispin Tickell, Joanna Lumley, Jilly Cooper, Simon Jenkins, and others.
[8] In 1974, Charlotte Johnson Wahl was treated in Belgium for phobias, obsessive-compulsive disorder, and anxiety around her children, which she said her husband was unsympathetic to.
[10] On 13 September 2021 Johnson Wahl died at St Mary's Hospital in London, at the age of 79.
[20][8] In 2015 the Evening Standard referred to Johnson Wahl as "left-wing", with her daughter Rachel stating that her father Stanley "tends to marry socialists".
[21] In October 2019, during Boris Johnson's speech to the Conservative Party conference, he said that his mother voted for the United Kingdom to leave the European Union in the 2016 referendum.