The rise of  number of people with Shrestha has been drastic since 2007. This is mainly due to two factors. People deciding to stick with Shrestha last name instead elaborating with their specific family name  And 2nd reason, which is more important, is people of many so called lower castes putting shrestha as the last name - due to their inferiority complex or to get rise in social strata

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Pokhari Bro

Thats what I exactly think about rise in shrestha last name.