Jetta \j(et)-ta\ as a girl's name is pronounced JET-ah. It is of Danish origin. Modern name. Refers to jet, an intensely black, shiny gemstone. The mineral name means "stone from Gagai". The latter was a city in Lycia, Asia Minor.
Jetta has 3 variant forms: Jett, Jette and Yette.
Baby names that sound like Jetta are Yetta, Joetta and Jutta.