How is that possible?

It will starts with your first letter:

Example: Diya KM

Doris Kneen

Expecto patronum

*expecting a stag or a doe*

*Inferni comes out*

*Harry be leik*

SECTUMSEMPRA EXPULSO CONFRINGO REDUCTO IMPEDIMENTA STUPEFY INCARCEOUS BOMBARDA MAXIMA EXPELLIARMUS PETRIFICUS TOTALUS AVADA KEDAVRA

Wait-

Harry Potter *me dad* said the spell that killed me grandparents?

Harry realizing his mistake: oh sh**-

I'm entering my username RN

Oh no-

*Holds wand at the ready for the monstosity name*

I entered Asnoot Forsnoots your so right Diya because I got

Angelina Flint

Now i got Daisy Keddle

I put in my username and male and got..

Hengist of WoodcroftFilch

I entered my user-

It says Colloportus Snella Flint

Insulted AF

FILCH