The name Loretta originated from the Latin name Lauretta, which is a diminutive form of the name Laura. Laura itself derives from the Latin word 'laurus', meaning 'laurel'. The laurel plant was an important symbol in ancient Roman culture, used to crown victors and poets. As such, the name Loretta likely emerged in the Middle Ages, when Latin names became popular across Europe.

Loretta first appeared in written records in Italy during the 12th century. One of the earliest known bearers of the name was Loretta de' Monaldeschi, an Italian noblewoman who lived in Orvieto in the late 12th century. The name then spread across Europe, particularly in Catholic regions where Latin names were favored.

In the 13th century, Loretta di Nadiani, an Italian religious leader, established the Convent of Santa Maria dei Monti in Calcata, Italy. She later became known as St. Laurentia or St. Loretta, and her feast day is celebrated on February 9th in the Catholic Church. This likely helped popularize the name among Catholics.

One of the most famous historical figures named Loretta was Loretta de' Medici (1395-1456), a member of the powerful Medici family of Florence, Italy. As the wife of Piero di Cosimo de' Medici, she played an influential role in the political and cultural life of Renaissance Florence.

In the 19th century, Loretta Perfrement (1823-1891) was a French Catholic nun who founded the Congregation of the Franciscan Sisters of the Sacred Hearts of Jesus and Mary. She spent her life caring for the poor and orphaned children in France.

Another notable Loretta was Loretta Young (1913-2000), an American actress who had a long and successful career in film, radio, and television. She won an Academy Award for Best Actress in 1948 for her role in the film "The Farmer's Daughter".