Thanks chanaa_tarkari for your elaborated post.
Sorry form my ignorance.. but I didnt know that there are Newar Rajopadhyayas, Mishras and Jhas... can anyone else please shed some light on it..
Another thing, I dont think if i change my last name into Upadhyaya, anyone would believe that im a Khas bahun...
As far as reach of communication is concerned, I think you should actually visit some of the families in kathmandu itself where father is a Maharjan, and sons are suddenly Shresthas.
Looks like, you quoted a may be credible person on it, and then babbled your own baseless opinion [ last & second last paragraphs ]