Dear Sir,It seems there is a confusion. In Tirunelveli district ( I am told by elders) one will have TDharma Sasta as the Kula theivam, local goddess as kuladeivam and Moden as a Ellai Kaval deivam (boundary savior God). I don't know if only Madan is used as a Kula deivam. Our pity is that we never asked our elders about our history until after they are dead. I wanted to learn the secret of my mothers cooking of Avial and Venkaikai kari but it was too late. I have improved my avial by recalling the things she use to do for Udir Aviyal - Aviyal wihout runny gravy, but not the Ladies finger (vntaikay). My grand mother taught me to remove excess salt from Sambar etc., by putting a cooked (microwaved potato,) or a cooked rice ball in a clean old torn dhoti. The starch absorbs the salt as they have affinity and I taught this to my wife. So, Brahman society should collect all these experiences and make an arcahive for future generation. That is how the culture can be saved.
Potato absorbing salt is a well known culinary trick among many races in the world.
I don't think its just India alone since potato itself is not from India originally.