In multiple personality, first and middle names may be used by alternate personalities

“When I was in elementary school, a classmate of mine once returned to campus in September to announce that henceforth, she would be going by her middle name. Goodbye Megan, hello Jules. Her friends spent a week quizzing her about her choice and then moved on.” https://www.nytimes.com/2019/09/06/opinion/im-so-excited-for-40th-grade.html

Did they ask her about gender identification? Although both names are unisex, Megan is more commonly a girl's name https://en.wikipedia.org/wiki/Megan and Jules a boy's name. https://en.wikipedia.org/wiki/Jules

Did the classmate have multiple personality, and did the name change represent a switch to a more masculine alternate personality? I don’t know in that particular case. But I do know that it would have been a relevant question.