The name Edgardo is derived from the Old English name Eadgar, which is composed of the elements "ead" meaning "rich" or "prosperous" and "gar" meaning "spear." It dates back to the Anglo-Saxon period in England, around the 7th to 11th centuries AD.

One of the earliest recorded examples of the name is King Edgar the Peaceful, who ruled England from 959 to 975 AD. He played a significant role in unifying the Anglo-Saxon kingdoms and promoting monastic reform.

In the 11th century, the name appeared in the Anglo-Saxon Chronicle, an important historical record of events in Anglo-Saxon England. It was also found in various medieval manuscripts and charters from that period.

The name Edgardo is a Spanish and Italian variant of the Old English name Eadgar. It gained popularity in these regions during the Middle Ages, likely due to the influence of English and Norman nobility.

One notable bearer of the name was Edgardo da Vinea, an Italian jurist and diplomat who served as the chancellor to the Holy Roman Emperor Frederick II in the 13th century.

In the 16th century, Edgardo Mortara was an Italian Jewish boy who was forcibly taken from his family and raised as a Catholic, causing an international controversy known as the "Mortara Affair."

In the 19th century, Edgardo Donato was an Italian painter and engraver known for his landscapes and architectural scenes.

Another famous Edgardo was Edgardo Poe, a Puerto Rican writer, journalist, and political activist who played a significant role in the island's independence movement in the late 19th and early 20th centuries.

Edgardo Bauza, an Argentine football player and manager, had a successful career in the late 20th century, representing his country in the 1986 FIFA World Cup and later coaching several national and club teams.