Costanzo
A mainly Italian surname from a personal name meaning “constant” or “steadfast.”
The #5,794 most common surname in the United States (2010 Census) — about 1 in every 51,716 Americans shares it.
Etymology
Costanzo is an Italian surname derived from the personal name Costanzo, the Italian form of Latin Constantius or Constantius, built on constans meaning “constant, firm, steadfast.” In origin, it was a family name based on an ancestor’s given name rather than a description of a place or trade. The deeper sense is therefore “descendant of Costanzo” or “belonging to the family of the steadfast one.”
History
The name is found chiefly in Italy and among descendants of Italian emigrants abroad, especially in the Americas. It belongs to the large class of Italian surnames formed from a father’s or forebear’s given name. In records outside Italy, spellings may shift slightly, but Costanzo itself is the standard form.
Origin
Regions
Variant spellings
Fun fact
Because it comes from a virtue-name, the surname ultimately carries the same root as English words like “constant” and “constancy.”