Constancia is a name of Latin origin, meaning "constant" or "steadfast". It was popularized by early Christian martyrs who bore the name for its association with constancy and perseverance in faith. In Spanish-speaking countries, Constancia is often used as a female given name, while in English-speaking cultures it may be less common but still appears occasionally.
"The name Constancia saw a notable peak in popularity during the late 1920s to early 1930s, with a high of 8 births in 1930. After a decline, there was another surge in the 1960s and 1970s, with a total of 109 recorded births across the decades."