History of the Mithila region
Mithila (IAST: mithilā, also known as Mithilanchal, Tirhut and Tirabhukti) is a geographical and cultural region located in the Indian subcontinent. The native language is known as Maithili and its speakers are referred to as Maithils.
Source: Wikipedia — History of the Mithila region (CC BY-SA 4.0)