The name Trinidad is of Spanish origin, derived from the phrase "la Santísima Trinidad" meaning "the Holy Trinity" in reference to the Christian doctrine of the three divine persons in one God. This name is closely associated with the island nation of Trinidad and Tobago, which was discovered by Christopher Columbus on his third voyage in 1498 and named after the Holy Trinity.

The earliest recorded use of the name Trinidad dates back to the late 15th century when it was given to the island by Spanish explorers. It quickly gained popularity among Spanish Catholics as a given name, particularly in regions with strong ties to the Catholic faith and Spanish colonial influence.

One of the earliest notable individuals with the name Trinidad was Trinidad Guevara (1482-1558), a Spanish Dominican friar and theologian who served as the first Bishop of Guamanga (now Ayacucho) in Peru. He played a significant role in the evangelization efforts and the establishment of the Catholic Church in the Spanish colonies of South America.

Another prominent figure with the name Trinidad was Trinidad Sánchez (1726-1794), a Spanish Catholic priest and philosopher who served as the rector of the University of Salamanca. He was known for his contributions to moral philosophy and his defense of Aristotelian and Thomistic thought.

In the 19th century, Trinidad García de Munoz Munilla (1818-1887) was a Spanish writer and journalist who advocated for women's rights and education. She founded several schools for girls in Spain and wrote extensively on social and political issues.

Moving into the 20th century, Trinidad Jiménez (1951-present) is a Spanish politician who served as the Minister of Foreign Affairs and Cooperation in the Spanish government from 2010 to 2011. She has also held various other positions within the Spanish Socialist Workers' Party (PSOE) and has been a member of the European Parliament.

Lastly, Trinidad Morgades Besari (1928-2003) was a Spanish writer and historian from Catalonia. She is known for her works on Catalan culture and history, including her book "Històries de Barcelona" (Stories of Barcelona), which explored the city's rich heritage and traditions.