Janet \j(a)-net\ as a girl's name is pronounced JAN-et. It is of Scottish origin. Originally a diminutive of Jane, from the French Jeanette. Janeta and Jonet are earlier forms. Actresses Janet Leigh, Janet Gaynor; singer Dame Janet Baker; swimmer Janet Evans; figure skater Janet Lynn.
Janet has 21 variant forms: Gianetta, Janeta, Janeth, Janett, Janetta, Janette, Janit, Jannet, Janneth, Janetta, Jannette, Janot, Jenetta, Jenette, Jennet, Jennette, Jinnet, Jinnett, Johnetta, Johnette and Jonette.