DiegomSpanish Possibly a shortened form of Santiago. In medieval records Diego was Latinized as Didacus, and it has been suggested that it in fact derives from Greek διδαχή (didache) meaning "teaching". Saint Didacus (or Diego) was a 15th-century Franciscan brother based in Alcalá, Spain. Other famous bearers of this name include Mexican muralist Diego Rivera (1886-1957) and Argentine soccer player Diego Maradona (1960-).
EmilianomSpanish, Italian Spanish and Italian form of the Roman cognomen Aemilianus, which was itself derived from the family name Aemilius (see Emil). This was the name of a 6th-century Spanish saint.
LeonardomItalian, Spanish, Portuguese Italian, Spanish and Portuguese form of Leonard. A notable bearer was Leonardo da Vinci (1452-1519), an Italian artist and scientist of the Renaissance. He is known as the inventor of several contraptions, including flying machines, as well as the painter of the Mona Lisa. Another famous bearer was Leonardo Fibonacci, a 13th-century Italian mathematician. A more recent bearer is American actor Leonardo DiCaprio (1974-).
SantiagomSpanish, Portuguese Means "Saint James", derived from Spanish santo "saint" combined with Yago, an old Spanish form of James, the patron saint of Spain. This is the name of the capital city of Chile, as well as several other cities in the Spanish-speaking world.