What is the difference between janma rashi and naam rashi, for example a birth rashi of Mithun with a name rashi of Kark?
The janma rashi runs the whole life, so all stable works such as the muhurta for building a house and marriage are done by it. If the name is not from the janma rashi, its rashi gives a different element, which can be used in business, because bank, GST and tax records carry that name.
Related questions
A couple sleeps in the SW; one has an exalted Rahu and the other a debilitated Rahu. Can they sleep there?
Yes. After marriage, as in the hathleva ritual, the planets of one partner overlap the other, and the exalted planet's influence prevails.
Besides exaltation, debilitation and degree, how do we judge whether a planet is good or bad, for example in the 6th or 8th house?
The 6th and 8th house rule has not been given yet. The full rules will be taught later using example kundalis of five students. For now judge by exaltation and debilitation; not every 8th-house placement is bad.
Can a person whose Sun is debilitated (neech) have the drawing room in the East?
Yes, with remedies; he will not leave the East unused or build a toilet there. A drawing room is not a permanent seat. Only permanent seating, such as an 8-hour business seat, should not be chosen in the zone of a debilitated planet.
Do the directions of the kundli houses shift when the rashis or planets in them change?
No. The 4th house is always North, the 1st East, the 10th South and the 7th West, with the sub-directions between them. Like water flowing in a river, planets and rashis keep moving, but the direction a house represents stays fixed whichever planet or rashi comes into it.
Does a conjunction (yuti) work only when planets sit together, or also through aspect?
It also works through aspect. Sitting together and an aspect relationship both give the result, so Jupiter aspecting with its 5th, 7th or 9th aspect, or Saturn and Mars with their aspects, also forms the relationship.
Does being manglik stop a person from sleeping in the South-West?
Manglik has nothing to do with it. It is considered only at marriage matching, when Mars sits in the 1st, 4th, 7th or 12th house, and Mars is power, not inauspicious. For the SW check whether Rahu-Ketu are debilitated, and for the South whether Mars is bad.