Guillerma

Guillerma is a feminine name of Spanish origin, serving as the female form of Guillermo (the Spanish equivalent of William). Derived from the Germanic elements 'wil' (will, desire) and 'helm' (helmet, protection), the name carries the meaning 'resolute protector' or 'determined guardian.' While Guillermo has maintained steady popularity in Spanish-speaking countries, the feminine Guillerma is considerably rarer, giving it a distinctive quality. The name peaked in usage during medieval times but has since become an uncommon choice. Guillerma offers a formal, somewhat regal sound with its rolling 'r' and melodic ending. This name might appeal to parents seeking a connection to Spanish heritage while desiring something less common than typical feminine Spanish names like Isabella or Sofía.

Pronounced ghee-YER-mah.

As of October 2026, Guillerma ranked #4621 for girls in US births in 1940 SSA, peaked at #3814 for girls in 1930.