David Reimer – Wikipedia

David Peter Reimer (born Bruce Peter Reimer; 22 August 1965 – 4 May 2004) was a Canadian man born male but reassigned as a girl and raised female following medical advice and intervention after his penis was severely injured during a botched circumcision in infancy.. The psychologist John Money oversaw the case and reported the reassignment as successful and as evidence that gender identity …

https://en.wikipedia.org/wiki/David_Reimer