The name Abby is a diminutive form of the biblical name Abigail, which is derived from the Hebrew words "av" meaning "father" and "gil" meaning "rejoice or joy." Abigail can be translated to mean "source of joy" or "father's joy." The name Abby likely originated as a nickname or pet name for Abigail in English-speaking cultures.

Abigail is a prominent figure in the Old Testament of the Bible, appearing in the Book of Samuel. She was a wise and beautiful woman who became the wife of King David. Her story is recounted in 1 Samuel 25, where she intervenes to prevent bloodshed between her husband Nabal and David's men.

One of the earliest recorded instances of the name Abby as a standalone name can be found in the 16th century. Abby Askew, an English Protestant martyr, was burned at the stake in 1546 for her religious beliefs during the reign of Queen Mary I.

Throughout history, several notable individuals have borne the name Abby. These include Abby Aldrich Rockefeller (1874-1948), an American socialite and philanthropist who founded the Museum of Modern Art in New York City. Abby Kelley Foster (1811-1887) was an American abolitionist and radical social reformer who worked tirelessly for the anti-slavery movement.

In the realm of literature, Abby Brewster is a character in Joseph Kesselring's 1941 dark comedy play "Arsenic and Old Lace." Abby Borden (1828-1892) was an American woman who was accused but ultimately acquitted of murdering her father and stepmother in the infamous Lizzie Borden case.

Another notable Abby was Abby May Alcott (1800-1877), the mother of renowned author Louisa May Alcott. She was an active participant in the Transcendentalist movement and a supporter of women's rights.

While the name Abby has ancient roots, it has remained a popular choice for baby girls throughout the centuries, likely due to its pleasant sound and association with the biblical Abigail.