What is "belwar"

The Belwar are a Hindu sanadhya Brahmin caste found in North India, and mostly in Uttar Pradesh. Sanadhya Brahmins are called Belwars in mainly Sitapur, Lakhimpur, Hardoi, Barabanki, Gonda and Lucknow. They are also called as Bilwar or Bailwar. However they did not like to be called Bilwar or Bailwar.The word Bailwar was used to insult these Sanadhya- Brahmin's by other people.