Ahh well let me clarify that we are not Brahman anymore. Its Hindu sect and we have no relation now with Brahmans. Yes, before accepting Islam we were Brahman but now we are just muslims.
So what will you call your Dada's brother? Uncle? I think the rank remain same according to Islam. As Chacha is equal to father and Khala is eqaul to mother. Yes, can't replace father's name it is restricted.
Like Arabs, you can say Osama Bin Laden. Well his father's name is Mohammad. His full name is Osama Bin Mohammad bin Aud bin Laden.
Ahh well let me clarify that we are not Brahman anymore. Its Hindu sect and we have no relation now with Brahmans. Yes, before accepting Islam we were Brahman but now we are just muslims.