Banu translates to "children of" or "descendants of" and precedes name of a tribe like (hashim tribe is "Banu Hashim")

https://en.wikipedia.org/wiki/Lady_Tremaine

Reference in Descendants 2 (Disney Channel, 2017, movie)

• for: evolution, evolution - war, descendants - war
• paraphrase
  • Genetic analyses of human Y chromosomes (which are passed directly from fathers to sons) reveal that
    • groups of men who succeeded on the battlefield replaced the losing groups of men in the gene pool.
  • In other words, the coalitions of men who were successful in warfare not only survived
    • but reproduced with local women and passed on their genes.
  • Success on the battlefield was thus highly consequential.
  • Humans today are the descendants of those men who managed to dominate their opponents in war. -comment
  • wow!