deadnames

noun
  1. A person's former name, especially one used before a change of identity or legal name change.
  2. Usage: Often used in contexts of transgender or non-binary identity; Considered disrespectful to use someone's deadname without consent
verb
  1. To refer to someone by their former name, especially after they have changed their name or identity.
  2. Usage: Often considered disrespectful or harmful; Third-person singular present tense: deadnames; past tense: deadnamed

Examples