See also the related form, the English Jazlyn.
Jaz is not popular as a baby boy name. It is not in the top 1000 names.
Baby names that sound like Jaz include Jazz, Jazze, J, Jaac, Jac (Welsh), Jace (English), Jach (Czech and Polish), Jack (English and Dutch), Jacke, Jacks, Jacq, Jacs, Jae (English, Korean, and Indian), Jag, Jah, Jaice, Jaik, Jaike, Jak, and Jake (English and Hebrew).
† English pronunciation for Jaz: JH as in "joy (JH.OY)" ; AE as in "at (AE.T)" ; Z as in "zoo (Z.UW)"