The name Candelario has its origins in the Spanish language and culture, deriving from the Latin word "candela," meaning "candle." It likely emerged during the Middle Ages or earlier, as a reference to the candles used in religious ceremonies or as a symbolic representation of light and enlightenment.

One of the earliest recorded mentions of the name Candelario can be found in the "Codex Calixtinus," a 12th-century manuscript that served as a guide for pilgrims on the Camino de Santiago. The text includes a reference to a church dedicated to San Candelario, suggesting that the name was already in use by that time.

In the 13th century, a notable figure named Candelario de Salamanca was a prominent scholar and theologian at the University of Salamanca. He contributed to the development of scholastic philosophy and wrote several treatises on theology and metaphysics.

During the 15th century, the name gained popularity in Spain, with records indicating its use among both religious figures and laypeople. One notable bearer was Candelario de Villarreal, a Spanish explorer and navigator who accompanied Christopher Columbus on his second voyage to the Americas in 1493.

In the 16th century, Candelario Álvarez was a renowned Spanish painter known for his religious works, including altarpieces and frescoes adorning churches across Spain. His artworks were highly sought after and celebrated for their intricate details and skillful depiction of religious themes.

Another noteworthy figure was Candelario Obregón, a 17th-century Spanish military officer and diplomat who served as the governor of several provinces in the Spanish Empire. He played a crucial role in negotiating treaties and maintaining diplomatic relations with various nations.

Throughout history, the name Candelario has continued to be used, albeit with varying degrees of popularity. It remains a testament to the cultural and religious heritage of Spain, carrying the symbolic meaning of light and illumination.