Baby name
Jillian
/JIL · ee · an/
Meaning
“Youthful”
English elaboration of Jill, from Latin Julius; the -ian ending gives it more formal register than Jill alone.
How it ages.
Peaked in the 1980s US - a step above Jill in formality but the same era.
The cultural moment.
Common in the US from the 1970s-1990s; declining since.