Jill
Jill is an English feminine given name, a short form of the name  Jillian (Gillian), which in turn originates as a Middle English variant of Juliana, the feminine form of the name Julian.

People with the given name
Jill Astbury, Australian researcher into violence against women
Jill Balcon (1925–2009), British actress
Jill S. Barnholtz-Sloan, American biostatistician and data scientist
Jill Becker, American psychological researcher
Jill Biden (born 1951), American educator and the First Lady of the United States
Jill E. Brown (born 1950), African American aviator
Jill Carroll (born 1977), American journalist
Jill Clayburgh (1944–2010), American actress
Jill Costello (1987–2010), American athlete and lung cancer activist
Jill Craigie (1911–1999), British film director and writer
Jill Craybas (born 1974), American tennis player
Jill Dando (1961–1999), British television presenter
Jill Dickman, Republican member of the Nevada Assembly
Jill Duggar (born 1991), reality TV personality
Jill Fisch, American professor at the University of Pennsylvania Law School
Jill Frappier (born 1944), British voice actress
Jill Gascoine (1937−2020), English actress and novelist
Jill Gibbon, British artist
Jill Green, American dance educator and scholar
Jill Goodacre (born 1964), American model and actress
Jill Harris, American voice actress
Jill Hennessy (born 1968), Canadian actress and musician
Jill Ireland (1936–1990), British actress
Jill Johnson (born 1973), Swedish singer
Jill Knight (1923–2022), British politician
Jill Koshiol, American cancer epidemiologist
Jill Martin (1938–2016), English musical theatre actress
Jill Mellick, Jungian-oriented clinical psychologist
Jill Morris (born 1967), British diplomat
Jill Murphy (1949–2021), English writer and illustrator
Jill P. Carter (born 1964), American politician
Jill Scott (born 1972), American soul singer
Jill St. John (born 1940), American actress
Jill Talley (born 1962), American voice actress
Jill Vidal, Hong Kong singer
Jill Wagner (born 1979), American actress
Jill Paton Walsh (1937–2020), English novelist and children's writer
Jill Zarin, American television personality
Jill Zimmerman (born 1959), computer scientist and professor at Goucher College

Fictional characters
Jill, a character in the nursery rhyme "Jack and Jill"
Jill Foster Abbott, a character on the soap opera The Young and the Restless
Jill Andersen, Riley's mother during the events of Disney Pixar's Inside Out. Of note is that she is not named in the film itself, but rather in supplementary material.
Genocide Jill, a serial killer and the alternate personality of Toko Fukawa from the Danganronpa series
Jillian "Jill" Mastrano Dragomir, a character from Richelle Mead's Bloodlines (book series)
Jill Masterson, from Goldfinger
Jill Pembroke, a character in the American sitcom television series Charles in Charge
Jill Pole, a main character in C.S. Lewis' The Chronicles of Narnia: The Silver Chair
Jill Roberts, a main character in Scream 4
Jill Valentine, a character from the Resident Evil video games series
Jill, a character in Katharine Kerr's Deverry Cycle book series

Jill as middle name
Amy-Jill Levine (born 1956), feminist theology professor
J. Jill Suitor, sociology professor
Suzanne Jill Levine (born 1946), American poet and translator
Lara Jill Miller (born 1967), American actress