Today's ten thousand: "Deadnaming" is apparently calling a transgender person by the old name they abandoned, a "deadname" being the name of their former identity.
Deleting a record in some databases uses a process of marking the record with a “tombstone”, processes can be killed. Abandoning a former name that doesn’t align with a gender identity? Yeah, it’s dead to me.
Oh I get the logic all right, but I imagine the transition is a pretty sensitive topic that can be difficult for some family members or acquaintances. And this kind of vocabulary (death-related) in this context sounds like an odd choice.
But that's just a thought, I have no idea how it feels to transition and what kind of emotions are involved. Maybe it's more definitive that way, acting like the former identity does not "live" anymore.
IMO that's a weird term.