Bettyphobia
The fear of the name Betty. Usually, the name is used a nickname. Also used to say that someone doesn't like the nickname he/she is given.
"Oh look, it's Christine!! She has Bettyphobia."
"What does that mean?"
"Well, she doesn't like the nickname everyone's given her."
"What does that mean?"
"Well, she doesn't like the nickname everyone's given her."