It's also why "deadnaming" is so abhorrent to them.

Traditionally, when someone joined some mystery cult, secret society, or other offshoot minority religion, they'd be put through a ceremony that today would be called "hazing", but which tested your resolve to be a part of the group (and also a way of cementing loyalty and trust and all that good shit.)

Such a ceremony might include things like a ritual death and rebirth as a new person, with a new name ....