Rosio is a female name with origins in Spanish. It is a variant of the name Rosita and is pronounced as ROH-see-oh (/ˈrəʊ.si.əʊ/) in both British English and American English. The name has been given to newborns in California since at least 1965, with varying levels of popularity over the years. In recent years, it has remained relatively consistent, with an average occurrence of around 7 to 10 births per year. Rosio is a beautiful and unique name that would make a lovely choice for parents looking for something distinctive for their baby girl.