This is one of my favorite names as well! It sounds gutsy and uncommon, and I commend you on your willingness to be innovative.
Unfortunately, beyond being able to confirm that it appears to be of genuinely Rroma origin (the "Dj-" is characteristic, and one Rroma tribe of the Balkans is the "Djamba"), I can't help with the meaning...even after a prolonged search on Google. Sorry!
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Daividh