Guillermina is a feminine given name of Spanish origin, often used in various Spanish-speaking countries. The name is derived from the Germanic name Wilhelmina, which means "resolute protector." It has been popular in different cultures and can be found in various forms across languages. In addition to being a name, Guillermina can also refer to a character in literature or media. For example, it may appear in stories, films, or television shows, where it often represents strong, independent women. The name carries a sense of tradition and cultural significance in many communities.