What does Jil mean?
Jil is an uncommonly occurring given name for females but a somewhat prominent surname for both adults and children (#142819 out of 150436, Top 95%). (2000 U.S. Census)
Prominent alternative forms of Jil (#unlisted) are Jill and Jillian (#385 last year). Adoption of these girl names was at its peak during 1980-1989 (usage of 0.8825%) and is now significantly less (usage 0.3075%, down 65.2%), with the form Jill becoming less stylish. Jillian (#385) is the most fashionable baby name in this list. Shown below is an analysis of the usage of Jil and related names. (Top 1000 Baby Names Records, 2014)