Hidalgo in Spanish and Fidalgo in Portuguese were traditional titles of persons of nobility or gentry, derived respectively from hijo de algo and filho de algo, "son of some (important family)". Read more at Hidalgo (Spanish nobility).

Fidalgo

• Fidalgo Island.
• Salvador Fidalgo.

Hidalgo

• Giovanni Hidalgo, puerto-rican percussionist
• Miguel Hidalgo, father of the independence of Mexico.
• Hidalgo, a state in central Mexico, named after the above.
• Hidalgo, a fictional Central American nation in the Doc Savage stories.
• Hidalgo, Nuevo León, a city in northern Mexico.
• Hidalgo County, New Mexico, a county in the United States.
• Hidalgo County, Texas, a county in the United States.
• Hidalgo, Texas, a city in the United States.
• Miguel Hidalgo, D.F., a borough of the Mexican Federal District.
• Hidalgo (film), starring Viggo Mortensen, named for Frank Hopkins' horse.
• The asteroid 944 Hidalgo.
• The Treaty of Guadalupe Hidalgo, which ended the Mexican-American war.

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