Here I would like to say some few words
Pradhan didn't come to Nepal during Rana regime they were there who was centre of politics before Prithivi Narayan Shah. They even had power to change kings in Patan. One of the malls king was blinded by Pradhans you should have heard about 6th Pradhan. Pradhan are mainly Chhetri .the value of Pradhan detonated when most of the people from Darjeeling Sikkim and kalimpong started using it as it last name.
Now let talk about others
If you look at shahi kasai etc there we the rulers during goal dynasty. When Kirat came they were made slave. Even after wards when caste system was introduced by thiti malla all the oppents and people who were doomed as raj dhroh their wife and kids were given to them. So if you see shahi kasai and see their features they have mixed blood for long time and they are the most beautiful people both men and women. Will make another post about Shrestha