Onomastico

A name day is a tradition in many countries in Europe and Latin America that consists of celebrating the day of the year associated with one's given name. (from Wikipedia) 

(from The American Name Day Calendar of First Names - 1982) 

Agnes is a female given name, which derives from the Greek name Ἁγνὴ hagnē, meaning "pure" or "holy". The Latinized form of the Greek name is Hagnes, the feminine form of Αγνός Hagnos, meaning "chaste" or "sacred". The name passed to Italian as Agnese, to Portuguese as Inês, and to Spanish, as Inés. (from Wikipedia)

Agnes of Rome (c. 291 – c. 304) is a virgin–martyr, venerated as a saint in the Roman Catholic Church, Eastern Orthodox Church, the Anglican Communion, and Lutheranism. She is one of seven women, excluding the Blessed Virgin, commemorated by name in the Canon of the Mass. She is the patron saint of chastity, gardeners, girls, engaged couples, rape victims, and virgins. She is also known as Saint Agnes and Saint Ines. Her memorial, which commemorates her martyrdom, is 21 January in both the Roman Catholic calendar of saints and in the General Roman Calendar of 1962. The 1962 calendar includes a second feast on 28 January, which commemorates her birthday. Agnes is depicted in art with a lamb, as her name resembles the Latin word for "lamb", agnus. (from Wikipedia)