Priyavrata-vaṃśa and Saptadvīpa Vibhāga (प्रियव्रतवंशः सप्तद्वीपविभागश्च)
तस्मात्तु भारतं वर्षं तस्य नाम्ना विदुर्बुधाः / भरतस्यात्मजो विद्वान्सुमतिर्नाम धार्मिकः
tasmāttu bhārataṃ varṣaṃ tasya nāmnā vidurbudhāḥ / bharatasyātmajo vidvānsumatirnāma dhārmikaḥ
Therefore the wise know that land by his name as Bhārata-varṣa. Bharata’s son, learned and devoted to dharma, was known as Sumati.