Libby is a feminine given name of English origin, derived from the medieval diminutive form of the name Elizabeth. It emerged as a standalone name in the 19th century, particularly popular in the United States and parts of the United Kingdom.

The name Elizabeth itself traces its roots back to the ancient Hebrew name Elisheva, composed of the elements "El" (God) and "shava" (oath or covenant). This Hebrew name was translated into Greek as Elisabet and later into Latin as Elizabeth. The diminutive form "Libby" emerged as an affectionate nickname, softening the initial sound of the name.

In medieval times, the name Elizabeth gained significant prominence due to its association with Saint Elizabeth of Hungary (1207-1231), a revered Hungarian princess known for her charitable works and piety. The name also carried royal connotations, as it was borne by several European queens, including Elizabeth I of England (1533-1603), one of the most influential monarchs in British history.

One of the earliest recorded instances of the name Libby can be found in the 1855 novel "The Witch's Daughter" by Nathaniel Hawthorne, where a character named Libby is mentioned. However, it is likely that the name was in use before this literary reference.

Throughout history, several notable individuals have borne the name Libby:

1. Libby Holman (1904-1971), an American singer, actress, and torch singer during the 1920s and 1930s.
2. Libby Larsen (born 1950), an American composer of classical music and a former holder of the Pulitzer Prize for Music.
3. Libby Riddles (born 1956), an American dog musher who became the first woman to win the Iditarod Trail Sled Dog Race in 1985.
4. Libby Trickett (born 1985), an Australian former competitive swimmer and Olympic gold medalist.
5. Libby Lane (born 1966), the first woman to be consecrated as a bishop in the Church of England, appointed as the Bishop of Stockport in 2015.

While the name Libby has ancient roots, it gained widespread popularity as a standalone given name in the 20th century, particularly in English-speaking countries, thanks to its cheerful and friendly sound.