Hello Marcie.
Most of the members working on profiles with Spanish names are doing just as you are proposing.
Sometimes, you have to use your good sense to choose the LNAB for a profile.
Example:
https://www.wikitree.com/wiki/Ortiz_de_Cardona-1
According to the first (earliest) source, LNAB = de Cardona
On the 2nd. source, LNAB = Ortis y Cortes
On the 3rd. and 4th. sources, LNAB = Hortiz de Cardona
On the 5th. source, LNAB = Ortis
The name would look:
Juan de Cardona aka Hortiz de Cardona, Ortis, Ortis y Cortes
(Other Last Names alphabetically sorted)
The most significant source is the 3rd. one, his marriage record, LNAB = Hortiz de Cardona.
Hortiz and Ortis, in modern Spanish is spelled Ortiz.
That is why I chose:
Juan Ortiz de Cardona aka de Cardona, Ortiz, Ortiz y Cortés
The WikiTree search Person function has some limitations. The profile does not show up when searching for "Juan Ortiz y Cortés", but it does show up when searching for "Juan Cortés" (! ! ! ? ? ?)