The name Karlos originates from the Germanic word "karl," meaning "free man" or "man." It first appeared in the 8th century and is a variant spelling of the name Charles, which was derived from the Old Germanic name Karloz.

In the Middle Ages, the name Karlos gained widespread popularity across Europe, particularly in Spain and France. It was often associated with nobility and royalty, as several prominent figures bore this name. One of the earliest recorded examples is Charlemagne, also known as Karlos the Great (742-814), the King of the Franks and the first emperor of the Holy Roman Empire.

Another notable figure was Karlos V (1500-1558), the Holy Roman Emperor and King of Spain, who ruled over a vast empire spanning Europe and the Americas. His reign marked a significant period in European history, and he played a crucial role in shaping the political and cultural landscape of the time.

Karlos I (1887-1922), the last Emperor of Austria-Hungary and King of Hungary, Croatia, and Bohemia, was another prominent historical figure who bore this name. His reign witnessed the end of the Austro-Hungarian Empire during World War I.

In the realm of literature, Karlos Fuentes (1928-2012), a Mexican novelist and essayist, was a celebrated figure. He won numerous literary awards, including the Nobel Prize in Literature in 1987, and is renowned for his works that explored the complexities of Mexican identity and history.

Another notable bearer of the name was Karlos Gardel (1890-1935), an Argentine singer, songwriter, and actor who was instrumental in popularizing the tango music genre worldwide. He is considered one of the most influential figures in Latin American music and culture.

These are just a few examples of the historical significance and cultural impact associated with the name Karlos. Throughout the centuries, it has been borne by individuals from various walks of life, including royalty, writers, artists, and musicians, leaving an indelible mark on the annals of history.