Spanish form of Reynold, from Germanic "ragin" (counsel) and "wald" (power/ruler).
Reinaldo is the Spanish and Portuguese form of Reginald, constructed from the Proto-Germanic elements "ragin" (counsel, wise decision) and "wald" (ruler, power) — a pairing that has produced some of the most resonant names in Western history. Its Germanic family includes Roland, the legendary paladin of Charlemagne whose death at Roncevaux is immortalized in the 11th-century "Chanson de Roland"; Reynard, the clever fox of medieval fable; and Ronald, its Scottish branch. All share the same root of counseled power, wisdom governing strength.
In Latin American literary history, Reinaldo Arenas, the Cuban novelist born in 1943, elevated the name to international consciousness. A surrealist writer of extraordinary sensory power, Arenas was persecuted by Castro's government for his homosexuality and underground literary work, eventually seeking asylum in the United States, where he completed his memoir "Before Night Falls" shortly before his death in 1990. The memoir, later adapted into a film by Julian Schnabel, remains one of the defining documents of Cuban exile literature.
Arenas gave the name a fierce creative and political dignity. Reinaldo remains in steady use across Spain, Brazil, and Spanish-speaking Latin America, where it has never fully disappeared but has also never peaked into mass popularity. It carries the bearing of its etymology: something deliberate and strong, counsel and authority fused. For families with Iberian or Latin American roots, it is a name that honors tradition without feeling antiquated.