Why do Bangladeshi companies shy away from creating Sub Brands?

Look at Pran. Pran Chatni, Pran Cola, and Pran Juice all share the same name. Cola is a western drink and chatni is perceived as purely deshi food. Why couldn't they think of a western sounding name for the its carbonated cola beverage?

Akij bidi, Akij IT, and Akij Food and Beverage share the same name, too. Maybe they are in love with their founder father Mr. Akij. But there are other ways of showing respect. 

There are exceptions. Ascent. Scholastica, etc., and Coffee World  do not share same name.

We got to wise up!