Eliminating: Jacey because it isn't a nickname to me, Janiah because it's made-up sounding/looking, and Jazmyn because the spelling is horrible.
Leaving:
JadaJanaJanaeJanessaJaniya
JasminJasmineJasmineJasmynJaydaJaylaJaylenJaylene
JaylinJaylynJazminJennaJenniferJessieJewelJoanaJoannaJoelleJordynJosephineJosieJoyJulianaJuliannaJulianneJulieJulietJuliette
Are you not entertained? Are you not entertained? Is this not why you are here? - "Gladiator"