Hey, I was wondering what Arnez could mean... I do know I was named after the actor Desi Arnaz, my mom loved "I LoveLucy". Arnez is a possible spelling variant his surname which is Cuban. The problem is that my name is extremely rare, so I can't its meaning anywhere.
According to Gutierre Tibon's Diccionario Etimologico Comparado de los Appellidos Espanoles, HispanoAmericanos y Filipinos, Arnaz is a patronymic surname based on Arnaldo, so it would mean "son of Arnaldo."