Got an answer for my own question. Just read this from the Evisa Application Forms
"Instructions for completing an electronic visa application form:
1. Enter the information requested into the appropriate spaces on the form. Please answer all questions. Your answers must be in English and must use English characters. Letters like ñ, é, ü, ç are not recognized by the system. Please enter names like Muñoz and Sémonin as Munoz and Semonin. "
Anyway, for those who will ask the same question in the future, this thread will be a reference.
-Riza
RyaNRiza got a reaction from Carpe Vinum in Question about "Ñ / ñ" in my family name