Jonette is a feminine diminutive of the name Joan, which itself is derived from the Old French name Jehanne, a feminine form of Jehan. The name Jehan is the Old French variant of John, which originates from the Hebrew name Yochanan, meaning 'Yahweh is gracious'. Jonette, as a diminutive, carries a sense of endearment and familiarity, often used to denote a younger or smaller version of Joan.