Had written this the other day in response to the link to an article about the psychology of SW's namechange, but for some reason never posted it, so posting it now, slightly late to the party:
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Yes, I think the blogger who remembers meeting them in Polruan knew them as Tim and Sally. I can't remember with others -- which names did the Porters or Bill Cole know them by?
I think the namechange isn't about splitting off parts of the self, I think it's about presenting a palatable false self for public approval and/or to sell books via an image.
Like JT Leroy (reclusive American author who published a series of successful books about 'his' abusive past, underage sex work, drug addiction etc, but who turned out to be the entirely fictional invention of a woman who had a long history of using other pseudonyms for different types of writing, and of calling helplines posing as a young man, and who employed her SIL in a wig and sunglasses to 'act' as JT in public).
In JT Leroy's case, his invented life was much more dramatic than Laura Albert's, and gave an air of authenticity to his 'underworld' stories.
LA was sued for using the pseudonym to sign a film deal in the end, actually.
In SW's case, 'Raynor Winn' represents the special individual SW feels she is, and which was never (she felt) reflected in her deeply ordinary, suburban name and the deeply ordinary smalltown life she was destined for. She was always better than that. Raynor (ie not Sally) has this cool fake past, losing everything and responding with bravery and stoicism, and who just stumbled into fame. And likewise, Moth wasn't workshy townie Tim Walker, happy to live off his wife's stolen money, he was a child of nature and committed ecowarrior with lots of cool past exploits overseas in sport and shepherding, before being tragically struck down by disease.
Maybe the most interesting difference between Raynor/Moth and Sally/Tim is that fictional Raynor/Moth are completely unmaterialistic semi-recluses, whereas Sally/Tim's single most consistent joint personality trait is materialism and money-hunger. They like designer clothes, flash cars, and expensive homes. And above all they are workshy.