Likely a modern variation of Nasir, meaning helper or supporter
Nyzir is a contemporary American name, most likely a creative phonetic variation of the Arabic name Nasir. While its specific spelling is modern, it carries the traditional weight of its root, which signifies one who assists or brings victory. It has gained some usage in urban American communities over the last two decades.
US births per 5-year period, 1990–present (SSA data).