Brother
Derived from the Greek word 'adelphos', meaning brother. It shares the same linguistic root as the city of Philadelphia, the 'City of Brotherly Love'. While rare in the United States, it has historical use in Spanish and Italian speaking cultures.
Fewer than 5 boys were named Adelfo in 2025.
US births per 5-year period, 1990–present (SSA data).
Peruvian footballer and manager known as 'El Bólido'
Mexican lawyer and indigenous rights activist
