The painting's title dates to 1550. An acquaintance of at least some of Francesco's family, Giorgio Vasari, wrote, "Leonardo undertook to paint, for Francesco del Giocondo, the portrait of Mona Lisa, his wife", quoting a translation of Vasari (). The portrait's Italian name La Gioconda is the feminine form of her married name. In French it is known by the variant La Joconde. Though derived from Lisa's married name there is the added significance that the name derives from the word for "happy" (in English, "jocund") or "the happy one".
