What does the name Jillian mean? The meaning of the name Jillian is Youthful. The origin of the name Jillian is English. This is the culture in which the name originated, or in the case of a word, the language.
Alternate spellings: Gillian
People who like the name Jillian also like: Charlotte
, Hannah Benjamin
Name Notes: medieval form of Julian
Jillian - Within Temptation