Guillermina

Guillermina is the feminine Spanish form of Wilhelm, which derives from Germanic elements meaning 'will' or 'determination' and 'helmet' or 'protection.' This elegant name carries a sense of strength and nobility. Popular throughout Spanish-speaking countries, particularly in Mexico and Argentina, Guillermina offers common nicknames like Mina, Guille, or Gema. The name exudes a classic, sophisticated quality while remaining approachable. Though less common in English-speaking regions, Guillermina has endured as a traditional choice that connects to Spanish heritage while offering the appeal of both formal elegance and cute nickname options.

Pronounced ghee-yer-MEE-nah.

As of October 2026, Guillermina ranked #14023 for girls in US births in 2024 SSA, peaked at #1806 for girls in 1966.