Guillermo () is the Spanish form of the male given name William. The name is also commonly shortened to Guille.

People

• Guillermo Amador (1974–), American musician

• Guillermo Amor (1967–), Spanish footballer

• Guillermo Arévalo (1952–), a Shipibo shaman and curandero (healer) of the Peruvian Amazon ()

• Guillermo Barros Schelotto (1973–), Argentine footballer

• Guillermo Bermejo (1975–), Peruvian politician

• Guillermo C. Blest (1800–1884), Anglo-Irish physician settled in Chile

• Guillermo Cañas, Argentine tenniser

• Guillermo Cañedo, Mexican businessman

• Guillermo Chong, Chilean geologist

• Guillermo Coria, Argentine tenniser

• Guillermo Dávila, Venezuelan actor and singer

• Guillermo Díaz (actor) (1975–), American actor of Cuban descent

• Guillermo Diaz (basketball), Puerto Rican basketballer for the Los Angeles Clippers

• Guillermo del Toro, Mexican filmmaker, screenwriter, producer, author, actor, former special effects artist

• Guillermo Díaz (1979–), Uruguayan footballer

• Guillermo Díaz (1930–1997), Chilean footballer

• Guillermo Eleazar, Filipino police officer

• Guillermo Endara (1936–2009), Panamanian President, 1989–1994

• Guillermo Fernández (disambiguation), several people

• Guillermo Galván Galván, Mexican Army General

Guillermo Garcia (disambiguation), several people

• Guillermo García López, Spanish tennis player and coach

• Guillermo Willie Hernández (1954–2023), Puerto Rican baseball player

• Guillermo Willie Hernandez, Filipino former amateur tennis player

• Guillermo Lasso (1955–), Ecuadorian businessman and President of Ecuador, 2021–2023

• Guillermo Mac Millan (1940/1941–), Chilean urologist

• Guillermo Marquez, (fictional character) one of the two baby twin siblings of Dora in Dora the Explorer

• Guillermo Morphy, Spanish aristocrat and musicologist

• Guillermo Muñoz (disambiguation), several people

• Guillermo Novo, Cuban exile and militant

• Guillermo Ochoa, Mexican footballer

• Guillermo Pallomari, Chilean accountant and Cali Cartel member

• Guillermo Rawson (1821–1890), Argentine doctor and politician

• Guillermo Rigondeaux, Cuban boxer

• Guillermo Rodríguez, Spanish archer

• Guillermo Rodríguez, Venezuelan baseball player

• Guillermo Rodríguez, Uruguayan footballer

• Guillermo Rodríguez Lara, Ecuadorian politician

• Guillermo Rodriguez, Mexican-American studio security officer and sidekick for Jimmy Kimmel Live! (television show)

• Guillermo Solá, Chilean distance runner

• Guillermo Torrez, Bolivian politician

• Guillermo Vilas, Argentine tenniser

• Guillermo Viviani (1893–1964), Chilean Roman Catholic priest and trade unionist

• Luis Guillermo Madrigal Gutiérrez, athlete

See also

• Hurricane Guillermo