Feminine form of Jack via Jacqueline, from French, ultimately from Hebrew Jacob meaning 'supplanter'.
Jacklyn is an anglicized feminine form of Jack, itself a medieval pet name for John, which traces back through Latin "Joannes" and Greek "Ioannes" to the Hebrew "Yohanan" — meaning "God is gracious." The path from ancient scripture to a modern nursery winds through centuries of transformation, the name shedding its distinctly male character in the 20th century as parents began feminizing it with the suffixes "-lyn" and "-line." The French form Jacqueline arrived in English-speaking countries in the early 20th century and swiftly became fashionable.
No bearer did more for the name's prestige than Jacqueline Bouvier Kennedy Onassis, whose elegance and cultural sophistication elevated it to an icon of mid-century American style. "Jackie" became shorthand for a particular kind of poise and intelligence under pressure. The variant spellings — Jaclyn, Jacklyn, Jacquelyn — multiplied as parents sought the name's cachet while customizing it.
Actress Jaclyn Smith, one of the original Charlie's Angels, brought a glamorous pop-culture dimension to the Jacklyn spelling specifically in the 1970s. Today Jacklyn occupies a warm nostalgic space — less common than at its peak, which lends it a vintage individuality. It balances the friendly familiarity of "Jackie" with a more formal written presentation, making it equally at home on a report card and a wedding invitation. For parents who love the sound but want something slightly less expected than the standard spelling, Jacklyn offers a quietly distinctive choice.