Is Rocío a woman’s name?

As you know, most nouns ending in -o are masculine and most ending in -a are feminine. The exceptions can be particularly unexpected when they are names. It is a good idea to become familiar with the common exceptions to avoid confusion and embarrassment.

Women’s names ending in -o Men’s names ending in -a
Rocío, Rosario, Consuelo Chava, José María

Some names are used for both men and women:

Women’s namesMen’s names
Guadalupe (Lupe)José Guadalupe