Youthful or downy-bearded
Jilliann is an elaborated spelling of Jillian, which is the English feminine form of Julian. It ultimately derives from the Roman family name Julius, associated with the Greek word for 'youthful' or the soft down of a young beard.
Less common today
Jilliann isn't in the latest US Top 1000. It last peaked at #6,354 in 2000.
US births per 5-year period, 1990–present (SSA data).
