Domingo is of Spanish and Italian origin, derived from the Latin word "dominicus," which means "of the Lord" or "belonging to the master." It is a popular given name in both Spain and Italy, as well as in many other countries with significant Hispanic and Italian communities. The name Domingo has been used for centuries and was borne by several notable historical figures, including Domingo de Guzmán, the founder of the Dominican Order, and Domingo Faustino Sarmiento, an Argentine writer and politician who served as president of Argentina from 1868 to 1874.
The name Domingo experienced some fluctuation in popularity over the years, with a notable gap between 1921 and 1933 before stabilizing at 5 births per year from 1933 onwards.