Jha is a surname of Nepal and India, originating from the Mithila. People having Jha as their surnames belong to the 'Maithil Brahmin' caste. They are typically native to Northern part of Bihar. Maithili, language and culture has predominantly East Indian flavours.
Notable people with this surname
ujjwal jha,Madhubani ,Maithili and Technical Consultant of Clavax
References
Jha (surname) Wikipedia(Text) CC BY-SA