Madhav Kumar Nepal (माधवकुमार नेपाल) , the current Prime Minister of Nepal;  aka Makune, dropped his surname Upadhyaya, and he is against the caste system.

See Article on Wiki.

Intercaste marriages illegal in India and Nepal

Kathmandu, Nepal, October 23 — Chandra, my 28-year-old sister, was working in Kathmandu, Nepal, and her Indian boyfriend wanted to marry her. He was in the process of finalizing the marriage. But then, my sister decided to run away to her boyfriend that lives in New Delhi, and her true love.

Intricacies of Inter-Caste Marriage between Dalits and Non-Dalits in Nepal Couples’ Perspectives

Author : Keshari Kansakar and Sita Ghimire
Submitted Date : 2010-03-11 07:27:35

This  study seeks to find out the consequences of inter-caste marriage on hypergamous (a non-dalit man marrying a dalit woman) and hypogamous (a dalit man marrying a non-dalit woman) couples: Whether they face social exclusion in the form  of socio-cultural and economic ostracism from families and the society?The study’s assumption is that families and society  are likely to accommodate/ accept hypergamous or hypogamous couples given their level of education and occupation . The research was based on primary sample of 92 inter-caste married couples ( 31 hypergamous and 61 hypogamous )from the Kathmandu valley and from the eastern and western parts of the country . despite being small in sample size,simple bivariate analysis was also carried out to corroborate qualitative analysis. The study finds that the acceptance of hypergamous marriage by non-Dalit families and society was still very rare except under some exceptional circumstances such as lack of strong kinship network in the family, exposure to outside world, or the strong influential family that could overshadow the breakdown of social norm. Irrespective of the level of education  and occupation, there was no acceptance of hypergamous marriage by non-Dalit families and society. On the other hand, non-Dalit and natal family’s acceptance of hypogamous marriage was selective and conditional. Natal families accepted those Dalit sons-in-law who had higher education and held good job. Given the difficulty in getting social acceptance of hypergamous marriage by the families and society, the elimination of caste-based discrimunation seems to be a big challenge. There is a need for combined and concerted effort from the political parties, legel system and the society includien Dalit community to end caste -based diecrimination prevailed in the society.