History:

Chattu: This surnames spread was a mix of people choosing to move and being forced to move. Some might have sought better jobs or married into families elsewhere. Trade routes probably helped, with people settling near them. Wars or political problems might have also forced some to move. Where families with this surname settled depended on things like water, good farmland, and existing towns. The surname itself might have changed over time because of different languages and cultures.

Description:

Its probably a rare name, maybe used by a small, specific group of people in a particular area. I need more details to help you.