If I'm writing an x Reader, then here's all of the abbreviations that might be used!
P/S: it doesn't matter what gender the reader is, use whatever you're comfortable with, but with that said, there will be multiple gender readers.
(Y/n) - Your name
(Y/f/n) - Your first name
(Y/l/n) - Your last name
(M/n) - Mother's name
(M/f/n) - Mother's first name
(M/l/n) - Mother's last name
(F/n) - Father's name
(F/f/n) Father's first name
(E/c) - Eye color
(H/c) - Hair color
(F/c) - Favorite color
(F/f) - Favorite food
(F/d) - Favorite drink