Jacquelyn is a feminine given name, a variant of Jacqueline commonly used in the English-speaking world. The name ultimately derives from French Jacques, the French form of James, which itself traces back through Latin and Greek to the Hebrew name Yaʿaqov (Jacob). Means 'may God protect' or 'supplanter'. Etymology and History Jacqueline entered English through French, as the feminine form of Jacques (equivalent to English James). The spelling -lyn reflects a common English feminine suffix, popularized in the 20th century. While Jacqueline has long been used in France, the variant Jacquelyn arose in the United States, particularly in the mid-1900s, as parents sought unique spellings of familiar names. Notable Bearers A famous historical bearer was Jacqueline, Countess of Hainaut (1401–1436), also known as Jacqueline of Holland, whose life inspired the novel Jacqueline of Holland (1831) by Thomas Colley Grattan. In modern times, the name is strongly associated with Jacqueline Kennedy Onassis, the stylish First Lady of the United States (whose name, however, was spelled Jacqueline). The name has also been borne by actresses such as Jacqueline Bisset and Jacqueline Fernandez. Cultural Significance Jacquelyn and its variants (including Jacklyn, Jaclyn, Jaqueline) were particularly popular in English-speaking countries during the 1940s–1970s. Diminutives like Jackie (also used for men) and Jacqui are common nicknames. The naming pattern reflects a broader trend of feminizing masculine names (e.g., Joseph → Josephine, Paul → Paula, James → Jacqueline).