Isabella is very pretty. Some more spanish girl names could be
Arianissa
Anniya
Estrella (star in spanish)
Janiya
Rosalva
Ilianna
Arianna
Sariya
Esperenza
Lanaya
Aubrianna
Jalisa
Maribel.
Hope this helps a little bit at least :)
Isabella is beautiful. Katarina, Giselli, and Rosaria are also Spanish names. Good luck