The name Jill is a female given name. It comes from Latin. It means sweetheart or youthful. The name is short form of Jillian, but it is now an independent name within its own right. Famous people with the name include: Jill St. John, Jill Clayburgh, Jill Bennett, Jill Eikenberry and Jill Biden. This name is also used in the Jack and Jill nursery rhyme.