Inez is of Latin origin and means "pure" or "chaste". It was popularized by the Spanish novel "La Novela de Genoveva de Brabante", where Iñez was a virtuous heroine. The name has been used occasionally in English-speaking countries, but it remains more common in Spain and other Hispanic nations.
"The name Inez experienced fluctuations in popularity over the course of the century, peaking in the mid-1920s with a high of 30 births in 1922 and remaining relatively popular throughout the 1940s and early 1950s. However, it saw a significant decline from the mid-1950s onwards, with fewer than 10 births per year since 1956."