Jillian

Medieval English vernacular form of Juliana, deriving from the Roman family name Julius. The spelling with a J gained traction in the twentieth century to prevent the hard G pronunciation common in English. It entered the national tally during the Second World War and climbed steadily through the early 1980s.

The name reads as a friendly, capable classmate who arrived with freshly sharpened pencils and spare notebook paper. It peaked in 1982 alongside cassette singles and color-blocked windbreakers. Unlike its sister form Jill, which belongs mostly to the baby boom, a Jillian is almost always under forty-five. It suggests someone who will organize the carpool and send the confirmation text by eight in the morning.