Here's why:
* Hungarian sound and structure: The "-lla" ending is common in Hungarian surnames.
* Hungarian language: The name itself sounds like a Hungarian word and could potentially be a variation of an existing Hungarian word or place name.
However, it's important to note that:
* Surnames can be found across multiple nationalities. The surname could potentially be found in other countries due to migration, adoption, or other historical factors.
* Without further information, it's impossible to say for certain.
To determine the exact origin of the surname "Csurilla", you would need to research the family history or consult with a genealogist.