As far as I know, there are two categories of bahuns in Nepal. 1. Kumai: they hail from kumaon and garwhal area of nowadays india. They are of khas origin. Surnames: prasai, bhetwal, regmi, lohani, bista, bhatta, panta, kharel, sitaula, sedhai, upreti, oli, Sangraula, Mainali, shiwakoti, etc. There are plenty of kumai bahuns in wester part of nepal and jhapa.
2. purbia: these are nepalese hill bahuns. Most of the common bahun surnames like dahal, khanal, bhattarai, koirala, subedi, ghimire etc fall on this category. They are resident of eastern and mid regions of nepal.

Upadhyaya and jaisi are two ranks in both bahuns. Upadhyaya are regarded as purer and permitted to practise karmakand while jaisi, descendants of a upadhyaya bahun and a widow woman, are believed to be degraded and are not permitted to practise karmakand.

Both jaisi and upadhyaya have common surnames. Beside these two, khatri (offsprings of a bahun man and a chhetri woman) and Hamal (child of a bahun man and a thakuri woman) have the same bahun surnames. However, castewise khatri and hamals fall into chhetri category.

NALAPANI made this completely clear. Thanks.

 pichas:

what do you mean by "Jaisi haru Ko kokh ma daanth huncha re"??? i did not quite get that .....

 @NALAPANI :- Thanks, it is now very clear to me. 

You guys rock.

Kumai & Purbia Bahun.....

Para purba kaal ma.. ... kunai rishi le aafno chori ko bibaha gardai thiye..... tin ka dui choi thiye...  kanchi chori sanai thiye.... jiddi garera didi ko bihay ma didi ko kakh ma base rahe theee....

sindue halne kram ma sindur tyo balika ko kum ma pani khasna gayo..... tes pachi brahman le... yo aru ko sindur pareko balika mailay rakhna mildaina bhanera dubai chori ekai bhatta brahman lai diye....

tes pachi.... didi jo "purbabhd bidhi" le bibaha bayo ush bata janmeka santan "purbiya brahman" bhaye .... bahini ko sanjog le bihay bhayo , uni bata janmeko santan haru "kumai brahman " ka rup ma chiniye....

Yo malai ek jana jyotish sastri le bhaneka kura ho.... yo kun rishi ko chhori haru hun athawa tyo rishi ko naam k ho..... yo kun grantha ma lekheyeko chha malai tha chaina....  ti jyotish sastri le bhaneka kura matra dohora yeka ho....!!


BTW.....
Bodmas, are you in a dilemma of explaining your parents why you should marry Kumai bahun girl/boy ???

 @gyanguru :- Thanks for you input.  Bro le bhanejasto hoina bro, I am a married guy. As I said earlier it was just to educate myself. 

 कुमाउ बाहुनहरु नेपालको सुदुर्पस्चिम तिर निकै छन, किनभने कुमाउ बहुन्हरु भारत को कुमाउ र गढ्वाल  (उत्तराखन्ड ) बाट आएका हुन । तिनिहरु को बसोबास नेपालको सुदुर्पस्चिम तिर भयो भारतबाट । र अहिले "बैतडी" "डडेलधुरा" "बझाङ" "डोटी" "धनगढी" "महेन्द्रनगर" जस्ता थाउमा प्रसस्त छन । जस्तइ "भट्ट " "पाठक" "पन्त" "अवस्थी" "जोशी" (नेवार जोशी हैन ), "पनेरु" इत्यादी । 

From what I know Brahmins have 3 tiers:
Upadhyaya
Kumai
Jaisi
As for surnames, Sharma and Upadhyaya are Upadhyaya Brahmins. Rest of the surnames are shared equally by all.
Some Upadhyaya Brahmins write 'Upadhyaya' after their name to indicate they are Upadhyayas even though they have different surname e.g. Shailendra Kumar

 Please stop such research which does not benefit anyone. U may be trying to match caste to max. level for someone's wedding. I beleive there is only a caste in Nepal, i.e. NEPALI!!!!!

I do not know about Kumai bahun at all. but in other bahun.. jaisi are santan of those who were not married in  a proper way. Like, of from widow remarrying, lyaiteh, and whatever other non-typical 'kanyadaan' marriages.

What about sanyasi brahman? e.g. Giri Puri Bharati

Are they same or different from Jaisi and Upadhyaya?

 all bahun belong to india hahahe u all same kind why are u try to know different ....dont tell me u still gose with my this kind that kind

 @metalgal - all human race belong to Africa he he he.
BTW:-  My thread was not intended for that purpose, but if that is the only thing you can infer then it is your problem not mine. If you read the opening of the thread I soooo you(and your type) away in the very begining. 

From my side the thread got all the answers it was looking for. Thanks all for your input. 

I am parajuli
I am marrying oli soon
My family iz not accepting this
Coz they are not sure what is the caste oli from western Nepal plz tell me

jaisis are atually joshis and not differernt to others. but pn shah banned them from doing their job as jyotish since they once conspired with valley king and tried to kidnap his eldest son while hunting.
from then onwards ,jaisi bahuns were degraded from others and not allowed to perform rituals like public pujas and astrology works.
otherwise ,the upadhayas consider themselve pure since they didnt mix with khas race when they came northwards to hinduise the khas. the ones who took hinduism easily or married upadhyas became khas bahuns(both purbiya and jaisis).and the pure khas who accepted the thread became chetris while the ones who resisted became the matwali khas and dalits.

The Dharmasutras and Dharmasatras text of Hinduism describe the expectations, duties and role of Brahmins. The rules and duties in these Dharma texts of Hinduism, states Patrick Olivelle, are primarily directed at Brahmins.^[14][15] The Gautama's Dharmasutra, the oldest of surviving Hindu Dharmasutras, for example, states in verse 9.54-9.55 that a Brahmin should not participate or perform a ritual unless he is invited to do so, but he may attend. Gautama outlines the following rules of conduct for a Brahmin, in Chapters 8 and 9:^[16][17]

• Be always truthful
• Conduct himself as an Aryan
• Teach his art only to virtuous men
• Follow rules of ritual purification
• Study Vedas with delight
• Never hurt any living creature
• Be gentle but steadfast
• Have self-control
• Be kind, liberal towards everyone

Up + adhyaya = Updhyaaya , those got to the highest study. Later they started they were the purest as well highest in the rank.
I am pretty sure in Hindkush these learned people were the must racist as well must cruel people and they are still practicing it. There must be some reasons behind it.
Purity was not Hitlar's theory it is borrowed from Hindkush's learned people who kept education as their rights and assets. . There is no cast in any Veds but Varna .
They wrote another book DharmaSastra : and divide people by work.

magorkhe1,
You said "Hindukush's learned people who kept education as their rights and assets." which is factually incorrect which today is a common interpretation of the actions of the people who lived more than 3000 years ago.

However there does exist There could have been various motives. One of them is that at that time there was not a social mobility as it is today. There were rulers, Learned (philosophical), business(traders who brought goods from one place to another or manual manufacturing) and service people(who were laborers carrying goods and other services). It was not like today that a person can do various jobs and make decent living. The job market since around 17th century has really exploded and we are thinking on these terms. We know that Newars in Kathmandu kept their art of making some items a family secret much like the patent in today's world. This was a protection in a society where mechanism of intellectual property protection was not available.

It is NOT a fact that learned people(Brahmins) kept education as their rights and assets. Sage Vyasa, the original author of the Mahabharata, was born to a fisherwoman. Rishi Valmiki the original composer of Ramayana came from a tribal family of traditional hunters and there are many other examples from the historical books.

In today's society it is foolish to give much credence to the cast system because of huge societal changes that have happened in the thousands of years. Specially in the 21st century the cast system has lost its relevance. Today because of mobility enabled by modern technology people have much better grasp of the ideas of humanity and besides you would rather marry an educated person who is equal to you than another who cares least about it .

In the end I have to say Hindu Dharma is simply great. It enables an individual to actually reach the ultimate not like the Christian and Muslim religion which simply cares if people are following books written thousands of years ago to the dot.

Your parent moved to big city and no body knows who belongs to which cast. In hilly area discrimination is there and it is more severe in Tarai were new Indian immigrants are in larger numbers. They are not even allowing ri untouchable to touch their tubell and well for drinking water. Just get drinking water they may be paying something for it.
You may have heard but not seen.