Rosario comes from the Spanish title of the Virgin Mary, Nuestra Señora del Rosario, or "Our Lady of the Rosary", Rosary referring to the vocal and mental prayers in Catholicism, that reflect on the life of Christ and his Mother.

A nickname-name made famous by the uni-named Spanish singer Charo, whose full name was María del Rosario Pilar Martínez Molina Gutiérrez de los Perales Santa Ana Romanguera y de la Hinojosa Rasten.

Anglo parents are taking note of this Hispanic classic, thanks to actress Rosario Dawson and a character on Will & Grace. Poetic and powerful, it comes from the Spanish title of the Virgin Mary, Nuestra Señora del Rosario, or "Our Lady of the Rosary", Rosary referring to vocal and mental prayer in Catholicism, that reflect on the life of Christ and his Mother.

This is a modern Welsh name, stemming from the welsh word paidrín, meaning rosary.