Short, but still kind of a mouthful.

A rare, astronomical choice, Deneb is a blue supergiant star in the "tail" of the Cygnus constellation. Derived from the Arabic dhanab, it is borne by Deneb Karentz, a Biology professor in the US.

Feminine but strong name heard in Israel.

Igbo name made more familiar by its relationship to the popular Belle and Bella.

Distinctive Slavic choice.

Jocasta is a mythological name fashionably used in England, but mostly ignored here. She was the mother of Oedipus, King of Thebes, whom he (oops) unwittingly married. If you can ignore that small error in judgment, you'll find an interesting and attractive J name that's neither overused nor terminally dated.