Coyita would mean 'little coya' in Spanish, like
Conchita means little conch (shell).
It is possible to find a meaning for 'coya'. On
http://buscon.rae.es/diccionario/drae.htm it says: 1. Coya. f. Entre los antiguos incas, mujer del emperador, señora soberana o princesa.
So Coyita means 'Little Exalted Inca-Lady' or 'Little Inca
Princess' in Spanish.