Jillianne is a variant spelling of the name Julianne, which is derived from Julius, meaning "youthful and downy." The spelling of "Jillianne" features the phonemes /dʒɪl/ and /iːən/ with a double "l" indicating emphasis on the first syllable. The "i" in Jillianne is pronounced like an "ee" sound, while the "a" is pronounced as a schwa sound, making it a three-syllable name. Although compared to the more common "Julianne," "Jillianne" is a less frequently used alternative, it remains a distinctive choice for parents seeking a unique name for their daughter.