Meaning A girl's name of English origin, it means "Abbreviation of Jillian or Gillian. Jove's child." Origin of Jilly English Popular Middle Names Pronunciation 🔊 Listen Jilly Similar Names Jyl Jill Jilian Jilliann Jillianna Jillianne Jillanne Jillene Jillesa Jyllina Year by Year Popularity of Jilly