Board Thread:General Discussion/@comment-36171519-20191013151034/@comment-957629-20191013153531

Kenpachi and Yachiru do not know their birth names. She was named after Retsu Unohana, whose name, millenia ago, was Yachiru and Kenpachi greatly respected her. Both of them took the names of the districts they were born in, or at least where Kenpachi found Yachiru.

District 80 is called Zaraki and District 79 is called Kusajishi and both are the the worst ares of the Rukongai for poverty and violence.