misname

/M IH0 S N EY0 M/
noun
  1. 1

    A wrong, unsuitable, misleading, or injurious name or designation; misnomer.

verb
  1. 1

    To call by a wrong name.

  2. 2

    To give an unsuitable or injurious name to; name incorrectly.

Source: https://en.wiktionary.org/wiki/misname