when someone changes their name, especially because their old one is a bad time for them. usually because they are transitioning, but maybe because they were a high profile victim, or a relation of someone who was, or they are trying to escape abuse- and you carry on using it to punish them and deliberately hurt their feelings out of spite
The old name of a trans person. Insisting on calling someone by their old name who has transitioned is insulting and disrespectful, and refuses to acknowledge their wishes.