Proper Noun.
She who must not be named is the author of the book series
Harry Potter. In 2020 she officially outed herself as a
TERF after defending several "mistakes" with trans community.
As a result of being a
TERF the Harry Potter fandom no longer cares to even mention her by name. Her new name is inspired by he who must not be named who is the arch-villain,
Lord Voldemort, in the book series.