Deadname
From Encyclopedia Dramatica
Deadname is the name of a tranny before he goes insane and gets his penis chopped off. Referring to a tranny by his deadname is very triggering and reliably causes chimp outs. That's why you must always do it.
Deadnames of famous Trannies
Ahuviya Harel - Phillip V. Haskins-Delici. Brianna Wu - John Flynn. Chole Sagal - still under investigation, he changes his name more than he changes his underwear. Previously used names include John Neumann and Shawn Wolfram. Rani Bakr - Ralph Stuart Baker. Sarah Butts - Nicholas Nyberg.