Meaning and name origin
Gillian \gi(l)-lian\ as a girl's name (also used as boy's name Gillian), is pronounced GILL-ee-an, JILL-ee-an. It is of Latin origin, and the meaning of Gillian is "youthful". Anglicization of Juliana. A common name in the Middle Ages. Actress Gillian Anderson.
For more information, see also the related girl name Jill.
Gillian is a very popular first name for females (#1252 out of 4276, Top 29%) and also a very popular surname or last name for all people (#11068 out of 88799, Top 12%) (2000 U.S. Census).
Displayed below is the baby name popularity of the name Gillian for girls. Gillian reached its highest rank of #303 in the U.S. in 1999. (2014 statistics).
Displayed below is a comparison of the popularity of the girl name Gillian and its variant forms. Popular variation forms ranked in the Top 1000/100 are Juliana (#157), Jillian (#385), Jill and Gillian. (2014 statistics).