A long, long time ago, a renegade was a Christian person who decided to become Muslim. That definition is pretty outdated, as these days a renegade is anyone who breaks laws or expectations to do their own thing or join the other side. It might sound kind of cool to be a renegade, like some rogue action hero. But in general, renegade actions are frowned, not smiled, upon.
https://www.vocabulary.com/dictionary/renegade
The figure of the renegade—a European Christian or Jew who had converted to Islam and was now serving the Ottoman sultan—is omnipresent in all genres produced by those early modern Christian Europeans who wrote about the Ottoman Empire. As few contemporaries failed to remark, converts were disproportionately represented among those who governed, administered, and fought for the sultan. Unsurprisingly, therefore, renegades have attracted considerable attention from historians of Europe as well as students of European literature.
https://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198791430.001.0001/acprof-9780198791430
https://www.jstor.org/stable/451010?seq=1
The word "Renegade" came from Christians (mostly) who converted to Muslims during the time of the crusades, some forcibly some by their own choice. Barry obviously converted during his time in Indonesia, and his deep connections with Iran show that his conversion was completed. The Russian angle of his parents could allude to deep undercover agents, controlled by Russia or Russian leaning handlers.
Why choose the name "Renegade"?? To show your commitment to your cause.