Casiano
A surname of Romanic origin, most likely from a personal name based on Latin Cassianus.
The #6,349 most common surname in the United States (2010 Census) — about 1 in every 57,505 Americans shares it.
Etymology
Casiano is generally understood as a surname taken from a given name, especially the Latin Cassianus, meaning “belonging to Cassius” or “of Cassius.” Cassius was an old Roman family name, and Cassianus became a Christian personal name through early saints and later Romance-language use. In Spanish and related languages, Casiano functions as both a given name and a hereditary surname.
History
The name spread through the Christian naming tradition of the Latin world, helped by the popularity of saints such as Saint Cassian. In Iberian and Italian-speaking regions it could survive as a surname formed from an ancestor’s given name, later carried to the Americas through migration from Spain and other Romance-language areas. In the United States it is found especially among families with Hispanic background.
Origin
Regions
Variant spellings
Fun fact
Casiano is one of several surnames ultimately tied to the ancient Roman name Cassius, so it has roots that reach back more than two millennia.