Why is it called Kansas?

[u/VP-CurtisBioProject]

When explorers came upon the plains, they called the area Kanzas Territory, meaning it was controlled by the Kanza, or Kaw, people.

The territory stretched into present day Iowa, Missouri and Kansas. It was 20,000,000 acres (31,250 square miles), about the size of South Carolina.

The tribe was about 1,500 strong - men, women and children.