Jannette is a variant of the name Janet, which itself is a diminutive form of Jane. The name Jane originates from the Old French name Jehanne, which is derived from the Latin name Iohanna, a feminine form of Iohannes (John). The name John has Hebrew origins, coming from the name Yochanan, meaning 'Yahweh is gracious.' Jannette, as a variant, carries similar connotations of grace and divine favor.